diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 0f97fe4..51ba54f 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -11,25 +11,40 @@ public class Exercise {
 
     public void stepOne() {
         // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
-
+        numsZeroToThree = new int[4];
+        for(int i = 0; i<=3; i++){
+            numsZeroToThree[i] = i;
+        }
 
     }
 
     public void stepTwo() {
         // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
-
+        numsFiveToTen = new int[6];
+        int j = 0;
+        for(int i = 5; i<=10; i++){
+            numsFiveToTen[j] = i;
+            j++;
+        }
 
     }
 
     public void stepThree() {
         // TODO: 3. Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
-
+        countdown = new int[4];
+        int j= 0;
+        for(int i =3; i>=0; i--){
+            countdown[j] = i;
+            j++;
+        }
 
     }
 
     public boolean stepFour(int num) {
         // TODO: 6. Write a for loop that checks if num is in the favouriteNumbers array
-
+        for (int i =0; i < favouriteNumbers.length; i++){
+            if (favouriteNumbers[i] == num){return true;}
+        }
 
 
         return false;
@@ -37,7 +52,9 @@ public boolean stepFour(int num) {
 
     public boolean stepFive(String hobby) {
         // TODO 5. Write a for loop that checks if the hobby String is in the myHobbies array
-
+        for (int i = 0; i < myHobbies.length; i++ ){
+            if(hobby.equals(myHobbies[i])){return true;}
+        }
 
 
         return false;