diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 7ac3cfb..4d4e8eb 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -35,7 +35,7 @@ public String greet(String name) {
         Complete this method so that it increases the number given by 1 and returns the result
      */
     public int increment(int number) {
-        return 0;
+        return number + 1;
     }
 
     /*
@@ -48,8 +48,8 @@ public int increment(int number) {
         Nathan | Hi, Nathan :)
         Edward | Hi, Edward :)
      */
-    public String happilyGreet() {
-        return "Not implemented yet";
+    public String happilyGreet(String name) {
+        return "Hi, " + name + " :)";
     }
 
     /*
@@ -65,6 +65,15 @@ public String happilyGreet() {
         -1, 1  | [-1,0,1]
      */
 
+    public int[] constructNumberArray(int lower, int upper) {
+        int[] result = new int[upper - lower + 1];
+        for (int i = 0; i < result.length; i++) {
+            result[i] = lower;
+            lower += 1;
+        }
+        return result;
+    }
+
 
 
 
@@ -82,6 +91,15 @@ The method must return the same string in upper case with exclamation marks (!)
      */
 
 
+    public String shout(String string, int number) {
+        String result = "";
+        result = string.toUpperCase();
+        for (int i = 0; i < number; i++) {
+            result += "!";
+        }
+        return result;
+    }
+
 
 
 }
diff --git a/src/main/java/com/booleanuk/extension/Extension.java b/src/main/java/com/booleanuk/extension/Extension.java
index f9de7dd..c53655a 100644
--- a/src/main/java/com/booleanuk/extension/Extension.java
+++ b/src/main/java/com/booleanuk/extension/Extension.java
@@ -9,7 +9,9 @@ public class Extension extends ExtensionBase {
         5. Create a method named bakingTime that returns the number 50
      */
 
-
+    public int bakingTime() {
+        return 50;
+    }
 
 
     /*
@@ -20,7 +22,9 @@ public class Extension extends ExtensionBase {
         and the result of calling the bakingTime method
      */
 
-
+    public int remainingBakeTime(int minInOven) {
+        return bakingTime() - minInOven;
+    }
 
 
     /*
@@ -31,7 +35,9 @@ public class Extension extends ExtensionBase {
         each layer taking 3 minutes to prepare
      */
 
-
+    public int calculatePrepTime(int layers) {
+        return layers * 3;
+    }
 
 
     /*
@@ -45,6 +51,8 @@ public class Extension extends ExtensionBase {
      */
 
 
-
+    public int totalTimeSpent(int layers, int minsInOven) {
+        return calculatePrepTime(layers) + minsInOven;
+    }
 
 }