diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index 88350d7..63e20ee 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -117,19 +117,21 @@ public class Spreadsheet {
 	private void evaluateCell(int row, int col) {
 		String formula = cells[row][col].getFormula();
 		String result = "";
+		int colon = formula.indexOf(':');
+		String endSubstring = formula.substring((colon + 1), (formula.length()-1));
 
 		if (formula.startsWith("SUMME("))  // e.g. SUMME(A3:A8)
-			result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));  // TODO adapt to cells with two digits
+			result = "" + sum(formula.substring(6, colon), endSubstring);
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
-			result = "TODO"; // TODO
+			result = "" + prod(formula.substring(9, colon), endSubstring);
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
-			result = "TODO"; // TODO
+			result = "" + mit(formula.substring(12, colon), endSubstring);
 		else if (formula.startsWith("STABW("))  // e.g. STABW(C6:D8) -> Standardabweichung
-			result = "TODO"; // TODO
-		else if (formula.startsWith("MIN("))  // e.g. MIN(C13:H13) -> größter Wert
-			result = "TODO"; // TODO
-		else if (formula.startsWith("MAX("))  // e.g. MAX(A1:A10) -> Standardabweichung
-			result = "TODO"; // TODO
+			result = "" + stabw(formula.substring(7, colon), endSubstring);
+		else if (formula.startsWith("MIN("))  // e.g. MIN(C13:H13) -> kleinster Wert
+			result = "" + min(formula.substring(5, colon), endSubstring);
+		else if (formula.startsWith("MAX("))  // e.g. MAX(A1:A10) -> größter Wert
+			result = "" + max(formula.substring(5, colon), endSubstring);
 		else if (!formula.isEmpty()) {
 			try {
 				result = "" + calculate(formula);
@@ -148,11 +150,71 @@ public class Spreadsheet {
 	 * @return The sum calculated.
 	 */
 	private long sum(String startCellName, String endCellName) {
-		// TODO implement
 
 		return 0;
 	}
 
+	/**
+	 * Method for calculating the product of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The product calculated.
+	 */
+	private long prod(String startCellName, String endCellName) {
+
+
+		return 0;
+	}
+
+	/**
+	 * Method for calculating the arithmetic average of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The arithmetic average calculated.
+	 */
+	private long mit(String startCellName, String endCellName) {
+
+
+		return 0;
+	}
+
+	/**
+	 * Method for calculating the standard deviation of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The standard deviation calculated.
+	 */
+	private long stabw(String startCellName, String endCellName) {
+
+
+		return 0;
+	}
+
+	/**
+	 * Method for finding the maximum value of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The minimum value of the block.
+	 */
+	private long min(String startCellName, String endCellName) {
+
+
+		return 0;
+	}
+
+	/**
+	 * Method for finding the maximum value of a rectangular block of cells, such as from A1 to B3.
+	 * @param startCellName The name of the cell in the upper left corner of the rectangle.
+	 * @param endCellName The name of the cell in the lower right corner of the rectangle.
+	 * @return The maximum value of the block.
+	 */
+	private long max(String startCellName, String endCellName) {
+
+
+		return 0;
+	}
+
+
 	/**
 	 * This method calculates the result of a "normal" algebraic expression. It only needs to support
 	 * expressions like =B4 or =2+A3-B2, i.e. only with int numbers and other cells and with plus,
diff --git a/PR1-Spreadsheet.iml b/PR1-Spreadsheet.iml
index ea954f0..c319eea 100644
--- a/PR1-Spreadsheet.iml
+++ b/PR1-Spreadsheet.iml
@@ -4,8 +4,25 @@
     <exclude-output />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/Axel/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/Test" isTestSource="true" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library" scope="TEST">
+      <library name="JUnit5.8.1">
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter/5.8.1/junit-jupiter-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar!/" />
+          <root url="jar://$MAVEN_REPOSITORY$/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
   </component>
 </module>
\ No newline at end of file