diff --git a/Exercises/E26_Mehrdimensionale_Arrays/Exercise_7.cs b/Exercises/E26_Mehrdimensionale_Arrays/Exercise_7.cs
index e5465e5..355ec91 100644
--- a/Exercises/E26_Mehrdimensionale_Arrays/Exercise_7.cs
+++ b/Exercises/E26_Mehrdimensionale_Arrays/Exercise_7.cs
@@ -53,8 +53,21 @@ namespace Exercises_C_Sharp.E26_Mehrdimensionale_Arrays
         static Tuple<double[], double, double> WorkArray(double[,] dArray)
         {
             //Code START
-            dynamic d = -1;
-            return d;
+            List<double> rows = [];
+            double allSum = 0;
+
+            for (int i = 0; i < dArray.GetLength(0); i++)
+            {
+                double sum = 0;
+                for (int j = 0; j < dArray.GetLength(1); j++)
+                {
+                    sum += dArray[i, j];
+                    allSum += dArray[i, j];
+                }
+                rows.Add(sum / dArray.GetLength(1));
+            }
+
+            return new(rows.ToArray(), rows.Average(), allSum / dArray.Length);
             //Code ENDE
         }