diff --git a/PUE3_A1.4_Aktivitaetsdiagram.drawio b/PUE3_A1.4_Aktivitaetsdiagram.drawio
new file mode 100644
index 0000000..4327711
--- /dev/null
+++ b/PUE3_A1.4_Aktivitaetsdiagram.drawio
@@ -0,0 +1,195 @@
+<mxfile host="Electron" agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/27.0.5 Chrome/134.0.6998.205 Electron/35.3.0 Safari/537.36" version="27.0.5">
+  <diagram name="Seite-1" id="_YTyW-NZhgzYyk96uL8e">
+    <mxGraphModel dx="1188" dy="701" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
+      <root>
+        <mxCell id="0" />
+        <mxCell id="1" parent="0" />
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-51" value="" style="rounded=1;whiteSpace=wrap;html=1;fillColor=none;movable=0;resizable=0;rotatable=0;deletable=0;editable=0;locked=1;connectable=0;" vertex="1" parent="1">
+          <mxGeometry x="40" y="140" width="710" height="740" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-3" value="" style="group" vertex="1" connectable="0" parent="1">
+          <mxGeometry x="590" y="760" width="40" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-2" value="" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;" vertex="1" parent="WQNHvwU35Rzmy3TKDHLz-3">
+          <mxGeometry width="40" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-1" value="" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;fillColor=#000000;" vertex="1" parent="WQNHvwU35Rzmy3TKDHLz-3">
+          <mxGeometry x="5" y="5" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-14" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-6" target="WQNHvwU35Rzmy3TKDHLz-9">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-6" value="" style="ellipse;whiteSpace=wrap;html=1;aspect=fixed;fillColor=#000000;" vertex="1" parent="1">
+          <mxGeometry x="399" y="180" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-12" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-7" target="WQNHvwU35Rzmy3TKDHLz-9">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="250" y="275" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-7" value="int[][] matrix" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="210" y="120" width="80" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-13" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-8" target="WQNHvwU35Rzmy3TKDHLz-9">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="580" y="275" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-8" value="int[] scalar" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="540" y="120" width="80" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-16" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-9" target="WQNHvwU35Rzmy3TKDHLz-15">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-9" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="399" y="260" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-17" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-15" target="WQNHvwU35Rzmy3TKDHLz-22">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="260" y="325" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-18" value="matrix hat das 3x3 Format" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="WQNHvwU35Rzmy3TKDHLz-17">
+          <mxGeometry x="0.1722" y="-1" relative="1" as="geometry">
+            <mxPoint x="23" y="-14" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-19" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-15" target="WQNHvwU35Rzmy3TKDHLz-21">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="600" y="325" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-20" value="matrix hat nicht das 3x3 Format" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="WQNHvwU35Rzmy3TKDHLz-19">
+          <mxGeometry x="-0.2171" relative="1" as="geometry">
+            <mxPoint x="14" y="-15" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-15" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="399" y="310" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-50" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-21" target="WQNHvwU35Rzmy3TKDHLz-49">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="660" y="475" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-21" value="matrix = null" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="620" y="310" width="80" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-40" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-22" target="WQNHvwU35Rzmy3TKDHLz-34">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-22" value="int außenPosition = 0" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="214" y="350" width="120" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-24" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-23" target="WQNHvwU35Rzmy3TKDHLz-49">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="480" y="475" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-25" value="außenPosition &amp;gt;= 3" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="WQNHvwU35Rzmy3TKDHLz-24">
+          <mxGeometry x="-0.0561" y="1" relative="1" as="geometry">
+            <mxPoint x="-44" y="-14" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-29" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-23" target="WQNHvwU35Rzmy3TKDHLz-28">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-48" value="außenPosition &amp;lt; 3" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="WQNHvwU35Rzmy3TKDHLz-29">
+          <mxGeometry x="-0.4048" y="-2" relative="1" as="geometry">
+            <mxPoint x="-48" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-23" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="259" y="460" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-38" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-28" target="WQNHvwU35Rzmy3TKDHLz-36">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-28" value="int innenPosition = 0" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="214" y="520" width="120" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-31" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-30" target="WQNHvwU35Rzmy3TKDHLz-33">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="389" y="645" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-32" value="innenPosition &amp;gt;= 3" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="WQNHvwU35Rzmy3TKDHLz-31">
+          <mxGeometry x="-0.0892" y="2" relative="1" as="geometry">
+            <mxPoint x="1" y="-14" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-43" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-30" target="WQNHvwU35Rzmy3TKDHLz-42">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-44" value="innenPosition &amp;lt; 3" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="WQNHvwU35Rzmy3TKDHLz-43">
+          <mxGeometry x="-0.0903" y="2" relative="1" as="geometry">
+            <mxPoint x="48" as="offset" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-30" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="259" y="627.5" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-35" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=0;entryY=0.5;entryDx=0;entryDy=0;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-33" target="WQNHvwU35Rzmy3TKDHLz-34">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="119" y="425" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-33" value="außenPosition++" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="69" y="630" width="100" height="25" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-39" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-34" target="WQNHvwU35Rzmy3TKDHLz-23">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-34" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="259" y="410" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-37" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-36" target="WQNHvwU35Rzmy3TKDHLz-30">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-36" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="259" y="570" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-41" value="matrix[außenPosition][innenPosition] = matrix[außenPosition][innenPosition] * scalar" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="10" y="1110" width="260" height="50" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-46" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-42" target="WQNHvwU35Rzmy3TKDHLz-45">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-42" value="matrix[außenPosition][innenPosition] *= scalar" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="169" y="730" width="210" height="50" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-47" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-45" target="WQNHvwU35Rzmy3TKDHLz-36">
+          <mxGeometry relative="1" as="geometry">
+            <Array as="points">
+              <mxPoint x="404" y="835" />
+              <mxPoint x="404" y="585" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-45" value="innenPosition++&amp;nbsp;" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="224" y="820" width="100" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-53" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="WQNHvwU35Rzmy3TKDHLz-49" target="WQNHvwU35Rzmy3TKDHLz-52">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-49" value="" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="510" y="460" width="30" height="30" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-52" value="return matrix" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="480" y="860" width="90" height="40" as="geometry" />
+        </mxCell>
+        <mxCell id="WQNHvwU35Rzmy3TKDHLz-54" value="Matrix Multiplikation" style="text;html=1;align=center;verticalAlign=middle;whiteSpace=wrap;rounded=0;fontSize=19;" vertex="1" parent="1">
+          <mxGeometry x="69" y="180" width="121" height="60" as="geometry" />
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>