diff --git a/courses/gnatsas/metric_010_overview.rst b/courses/gnatsas/metric_010_overview.rst
index 108bd1651..01a20b02a 100644
--- a/courses/gnatsas/metric_010_overview.rst
+++ b/courses/gnatsas/metric_010_overview.rst
@@ -740,7 +740,7 @@ McCabe Example
 
   .. column::
 
-     .. image:: ../../images/gnatmetric/cyclomatic_complexity_edges_and_nodes.jpg
+     .. image:: ../../images/gnatmetric/cyclomatic_complexity_edges_and_nodes.svg
 
      9 edges - 7 nodes + 2 * 1 exit = complexity 4
 
diff --git a/images/gnatmetric/cyclomatic_complexity_edges_and_nodes.svg b/images/gnatmetric/cyclomatic_complexity_edges_and_nodes.svg
new file mode 100644
index 000000000..727234db3
--- /dev/null
+++ b/images/gnatmetric/cyclomatic_complexity_edges_and_nodes.svg
@@ -0,0 +1,411 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="102.78399mm"
+   height="102.22733mm"
+   viewBox="0 0 102.78399 102.22733"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.3.2 (091e20e, 2023-11-25, custom)"
+   sodipodi:docname="cyclomatic_complexity_edges_and_nodes.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="mm"
+     inkscape:zoom="3.0359421"
+     inkscape:cx="194.17366"
+     inkscape:cy="193.1855"
+     inkscape:window-width="2560"
+     inkscape:window-height="1369"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     showgrid="false" />
+  <defs
+     id="defs1">
+    <marker
+       style="overflow:visible"
+       id="DartArrow"
+       refX="0"
+       refY="0"
+       orient="auto-start-reverse"
+       inkscape:stockid="Dart arrow"
+       markerWidth="1"
+       markerHeight="1"
+       viewBox="0 0 1 1"
+       inkscape:isstock="true"
+       inkscape:collect="always"
+       preserveAspectRatio="xMidYMid">
+      <path
+         style="fill:context-stroke;fill-rule:evenodd;stroke:none"
+         d="M 0,0 5,-5 -12.5,0 5,5 Z"
+         transform="scale(-0.5)"
+         id="path6" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="DartArrow-4-2"
+       refX="0"
+       refY="0"
+       orient="auto-start-reverse"
+       inkscape:stockid="Dart arrow"
+       markerWidth="1"
+       markerHeight="1"
+       viewBox="0 0 1 1"
+       inkscape:isstock="true"
+       inkscape:collect="always"
+       preserveAspectRatio="xMidYMid">
+      <path
+         style="fill:context-stroke;fill-rule:evenodd;stroke:none"
+         d="M 0,0 5,-5 -12.5,0 5,5 Z"
+         transform="scale(-0.5)"
+         id="path6-8-7" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="DartArrow-3"
+       refX="0"
+       refY="0"
+       orient="auto-start-reverse"
+       inkscape:stockid="Dart arrow"
+       markerWidth="1"
+       markerHeight="1"
+       viewBox="0 0 1 1"
+       inkscape:isstock="true"
+       inkscape:collect="always"
+       preserveAspectRatio="xMidYMid">
+      <path
+         style="fill:context-stroke;fill-rule:evenodd;stroke:none"
+         d="M 0,0 5,-5 -12.5,0 5,5 Z"
+         transform="scale(-0.5)"
+         id="path6-8" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="DartArrow-3-4"
+       refX="0"
+       refY="0"
+       orient="auto-start-reverse"
+       inkscape:stockid="Dart arrow"
+       markerWidth="1"
+       markerHeight="1"
+       viewBox="0 0 1 1"
+       inkscape:isstock="true"
+       inkscape:collect="always"
+       preserveAspectRatio="xMidYMid">
+      <path
+         style="fill:context-stroke;fill-rule:evenodd;stroke:none"
+         d="M 0,0 5,-5 -12.5,0 5,5 Z"
+         transform="scale(-0.5)"
+         id="path6-8-0" />
+    </marker>
+    <marker
+       style="overflow:visible"
+       id="DartArrow-3-2"
+       refX="0"
+       refY="0"
+       orient="auto-start-reverse"
+       inkscape:stockid="Dart arrow"
+       markerWidth="1"
+       markerHeight="1"
+       viewBox="0 0 1 1"
+       inkscape:isstock="true"
+       inkscape:collect="always"
+       preserveAspectRatio="xMidYMid">
+      <path
+         style="fill:context-stroke;fill-rule:evenodd;stroke:none"
+         d="M 0,0 5,-5 -12.5,0 5,5 Z"
+         transform="scale(-0.5)"
+         id="path6-8-5" />
+    </marker>
+  </defs>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-61.027449,-89.790434)">
+    <g
+       id="g1"
+       transform="translate(-0.54076195,0.67767954)">
+      <rect
+         style="fill:#00ffff;stroke:#000000;stroke-width:0.0390894"
+         id="rect1-66-04"
+         width="5.0168839"
+         height="5.4171214"
+         x="114.53073"
+         y="143.67479" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="116.00565"
+         y="147.39104"
+         id="text1-6"><tspan
+           sodipodi:role="line"
+           id="tspan1-38"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.264583"
+           x="116.00565"
+           y="147.39104">B</tspan></text>
+      <rect
+         style="fill:#00ffff;stroke:#000000;stroke-width:0.0390894"
+         id="rect1-66-04-3"
+         width="5.0168839"
+         height="5.4171214"
+         x="93.62751"
+         y="143.67479" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="93.608116"
+         y="147.46425"
+         id="text1-6-2"><tspan
+           sodipodi:role="line"
+           id="tspan1-38-2"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.264583"
+           x="93.608116"
+           y="147.46425">!B</tspan></text>
+      <rect
+         style="fill:#00ffff;stroke:#000000;stroke-width:0.0390894"
+         id="rect1-66-04-3-9"
+         width="5.0168839"
+         height="5.4171214"
+         x="113.62756"
+         y="99.906776" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="115.07491"
+         y="103.62303"
+         id="text1-6-2-9"><tspan
+           sodipodi:role="line"
+           id="tspan1-38-2-3"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.264583"
+           x="115.07491"
+           y="103.62303">A</tspan></text>
+      <rect
+         style="fill:#00ffff;stroke:#000000;stroke-width:0.0390894"
+         id="rect1-66-04-3-9-9"
+         width="5.0168839"
+         height="5.4171214"
+         x="80.284286"
+         y="99.906776" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="80.264893"
+         y="103.69624"
+         id="text1-6-2-9-9"><tspan
+           sodipodi:role="line"
+           id="tspan1-38-2-3-8"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.264583"
+           x="80.264893"
+           y="103.69624">!A</tspan></text>
+      <rect
+         style="fill:#00ffff;stroke:#000000;stroke-width:0.0390894"
+         id="rect1-66-04-7"
+         width="5.0168839"
+         height="5.4171214"
+         x="115.21767"
+         y="165.81773" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="116.66933"
+         y="169.52882"
+         id="text1-6-9"><tspan
+           sodipodi:role="line"
+           id="tspan1-38-1"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.264583"
+           x="116.66933"
+           y="169.52882">C</tspan></text>
+      <rect
+         style="fill:#00ffff;stroke:#000000;stroke-width:0.0390894"
+         id="rect1-66-04-9"
+         width="5.0168839"
+         height="5.4171214"
+         x="93.516556"
+         y="165.81773" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="93.497162"
+         y="169.60719"
+         id="text1-6-5"><tspan
+           sodipodi:role="line"
+           id="tspan1-38-7"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke-width:0.264583"
+           x="93.497162"
+           y="169.60719">!C</tspan></text>
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66-09"
+         width="33.303589"
+         height="8.9966841"
+         x="130.98372"
+         y="169.11935" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="132.11191"
+         y="174.25159"
+         id="text1-39"><tspan
+           sodipodi:role="line"
+           id="tspan1-4"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="132.11191"
+           y="174.25159">Put_Line (&quot;BC&quot;)</tspan></text>
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.264999;stroke-dasharray:none;marker-end:url(#DartArrow-3-2)"
+         d="m 99.455202,141.5961 48.429578,26.76607"
+         id="path18" />
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.264039;stroke-dasharray:none"
+         d="m 99.342975,161.60239 49.370175,7.34278"
+         id="path20" />
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66-8"
+         width="33.303589"
+         height="8.9966841"
+         x="82.83828"
+         y="182.2785" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="93.127838"
+         y="187.86549"
+         id="text1-7"><tspan
+           sodipodi:role="line"
+           id="tspan1-7"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="93.127838"
+           y="187.86549">end if</tspan></text>
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66-6"
+         width="33.303589"
+         height="8.9966841"
+         x="82.83828"
+         y="152.49265" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="84.647736"
+         y="158.04347"
+         id="text1-3"><tspan
+           sodipodi:role="line"
+           id="tspan1-9"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="84.647736"
+           y="158.04347">or else C then</tspan></text>
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.264999;stroke-dasharray:none;marker-end:url(#DartArrow-4-2)"
+         d="m 99.519417,141.65825 -0.0316,9.27334"
+         id="path14" />
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66-4"
+         width="33.303589"
+         height="8.9966841"
+         x="61.633106"
+         y="110.73306" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="62.761292"
+         y="115.8653"
+         id="text1-5"><tspan
+           sodipodi:role="line"
+           id="tspan1-6"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="62.761292"
+           y="115.8653">Put_Line (&quot;!A&quot;)</tspan></text>
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66-7"
+         width="33.303589"
+         height="8.9966841"
+         x="104.04346"
+         y="110.98626" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="106.23015"
+         y="116.1185"
+         id="text1-1"><tspan
+           sodipodi:role="line"
+           id="tspan1-98"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="106.23015"
+           y="116.1185">Put_Line (&quot;A&quot;)</tspan></text>
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66"
+         width="33.303589"
+         height="8.9966841"
+         x="82.869926"
+         y="132.54167" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="95.224823"
+         y="138.15709"
+         id="text1"><tspan
+           sodipodi:role="line"
+           id="tspan1"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="95.224823"
+           y="138.15709">if B</tspan></text>
+      <rect
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.129791"
+         id="rect1-66-3"
+         width="33.303589"
+         height="8.9966841"
+         x="82.806633"
+         y="89.17765" />
+      <text
+         xml:space="preserve"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;fill:#000000;stroke:#000000;stroke-width:0.264583"
+         x="89.87072"
+         y="94.764641"
+         id="text1-8"><tspan
+           sodipodi:role="line"
+           id="tspan1-1"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:Monospace;-inkscape-font-specification:Monospace;font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583"
+           x="89.87072"
+           y="94.764641">if A then</tspan></text>
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.255276;stroke-dasharray:none;marker-end:url(#DartArrow)"
+         d="M 99.491888,98.163574 79.121806,109.92445"
+         id="path17" />
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.255276;stroke-dasharray:none;marker-end:url(#DartArrow-3)"
+         d="m 121.31075,120.03431 -20.37008,11.76088"
+         id="path17-5" />
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.255276;stroke-dasharray:none;marker-end:url(#DartArrow-3-4)"
+         d="M 99.568571,98.285828 119.93865,110.04671"
+         id="path17-5-1" />
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.257951;stroke-dasharray:none;marker-end:url(#DartArrow-3-2)"
+         d="m 77.728272,119.78059 20.48301,11.94243"
+         id="path17-5-4" />
+      <path
+         style="fill:#ccff00;stroke:#000000;stroke-width:0.264999;stroke-dasharray:none;marker-end:url(#DartArrow-3-2)"
+         d="m 99.490074,161.44685 10e-7,18.97796"
+         id="path21"
+         sodipodi:nodetypes="cc" />
+    </g>
+  </g>
+</svg>