diff --git a/csharp-fundamentals-loops.Main/Core.cs b/csharp-fundamentals-loops.Main/Core.cs
index 9194643..2e8918f 100644
--- a/csharp-fundamentals-loops.Main/Core.cs
+++ b/csharp-fundamentals-loops.Main/Core.cs
@@ -19,33 +19,55 @@ public class Core
 
         public void stepOne()
         {
-            // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array                        
-            throw new NotImplementedException();            
+            // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
+
+            for (int i = 0; i < numsZeroToThree.Length; i++)
+            {
+                numsZeroToThree[i] = i; 
+            }
+            //throw new NotImplementedException();            
         }
 
         public void stepTwo()
         {
             // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
-            throw new NotImplementedException();
+            for (int i = 0; i < numsFiveToTen.Length; i++)
+            {
+                numsFiveToTen[i] = 5 + i;
+            }
+            //throw new NotImplementedException();
         }
 
         public void stepThree()
         {
             // TODO: 3. Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
-            throw new NotImplementedException();
+            for (int i = 0, count = 3; i < countdown.Length; i++, count--)
+            {
+                countdown[i] = count;
+            }
+            //throw new NotImplementedException();
 
         }
 
         public bool stepFour(int num)
         {
-            // TODO: 6. Write a for loop that checks if num is in the favouriteNumbers array            
-            throw new NotImplementedException();
+            // TODO: 6. Write a for loop that checks if num is in the favouriteNumbers array
+            for (int i = 0; i < favouriteNumbers.Length; i++)
+            {
+                if (num == favouriteNumbers[i]) return true;
+            }
+            return false;
         }
 
         public bool stepFive(string hobby)
         {
             // TODO 5. Write a for loop that checks if the hobby String is in the myHobbies array
-            throw new NotImplementedException();
+            for (int i = 0; i < myHobbies.Length; i++)
+            {
+                if (myHobbies[i].Contains(hobby)) return true;
+            }
+            return false;
+            //throw new NotImplementedException();
         }
     }
 
diff --git a/csharp-fundamentals-loops.Main/Program.cs b/csharp-fundamentals-loops.Main/Program.cs
index 3751555..76cd2fd 100644
--- a/csharp-fundamentals-loops.Main/Program.cs
+++ b/csharp-fundamentals-loops.Main/Program.cs
@@ -1,2 +1,4 @@
 // See https://aka.ms/new-console-template for more information
+using csharp_fundamentals_loops.Main;
+
 Console.WriteLine("Hello, World!");