diff --git a/csharp-fundamentals-maps.Main/Core.cs b/csharp-fundamentals-maps.Main/Core.cs
index 8f4d84a..35c86de 100644
--- a/csharp-fundamentals-maps.Main/Core.cs
+++ b/csharp-fundamentals-maps.Main/Core.cs
@@ -48,10 +48,9 @@ in the createPerson method
 
         public string getValue(string key)
         {
-            
-           
-            return string.Empty;
+            Dictionary<string, string> map = createPerson(); // Call the createPerson method to get the map
 
+            return map[key];
 
         }
 
@@ -64,9 +63,9 @@ in the provided dictionary
          */
          public bool hasKey(Dictionary<string,string> dictionary, string isitthere)
          {
-            return false;
-            
-         }
+            return dictionary.ContainsKey(isitthere);
+
+        }
 
 
         //TODO: 3. Modify method named getValueOrDefault that accepts two parameters:
@@ -78,7 +77,14 @@ public bool hasKey(Dictionary<string,string> dictionary, string isitthere)
          */
         public int getValueOrDefault(Dictionary<string,int> dictionary, string isitthere)
         {
-            return 0;
+            if (dictionary.ContainsKey(isitthere))
+            {
+                return dictionary[isitthere];
+            }
+            else
+            {
+                return -1; // Return -1 if the key does not exist
+            }
 
         }
 
@@ -104,7 +110,13 @@ public List<string> buildSecretPhrase(int[] numbers)
             map.Add(7, "muse");
             map.Add(96, "nice");
             // Write your code below this comment...
-
+            foreach (int number in numbers)
+            {
+                if (map.ContainsKey(number))
+                {
+                    results.Add(map[number]); // add the string phrase associated with the number to result list
+                }
+            }
            
 
             //    // ...and above this comment
diff --git a/csharp-fundamentals-maps.Main/Extension.cs b/csharp-fundamentals-maps.Main/Extension.cs
index 2deb96d..1298167 100644
--- a/csharp-fundamentals-maps.Main/Extension.cs
+++ b/csharp-fundamentals-maps.Main/Extension.cs
@@ -16,7 +16,7 @@ public Extension()
             _planets = new Dictionary<string, float>();
             _planets.Add("Jupiter", 5.2f);
             _planets.Add("Uranus", 19.2f);
-            _planets.Add("Pluto", 39f);
+            //_planets.Add("Pluto", 39f);
             _planets.Add("Mercury", 0.39f);
             _planets.Add("Saturn", 9.54f);
             _planets.Add("Earth", 1f);
@@ -35,7 +35,10 @@ public Dictionary<string,int> LettersInName()
             //TODO   Complete this method to return an Dictionary of <string,int> which contains 
             //          the planet name and the number of letters in its name
             //          iterate the _planets using a foreach object to load the result dictionary.
-
+            foreach (var planet in _planets)
+            {
+                result.Add(planet.Key, planet.Key.Length);
+            }
             
 
             return result;
@@ -52,7 +55,7 @@ public Dictionary<string,float> OrderedPlanets()
         }
         public Dictionary<string, float> OrderedPlanetsByDescending()
         {            
-            return _planets.OrderBy(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
+            return _planets.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
         }
         //TODO:  modify the OrderedPlanetsByDescending so it is not dictionary is not doing an OrderBy but OrderByDescending
 
@@ -67,7 +70,8 @@ public Dictionary<string, float> OrderedPlanetsByDescending()
 
         public string FurthestFromTheSun()
         {
-            return string.Empty;      
+            Dictionary<string, float> orderedPlanets = OrderedPlanets();
+            return orderedPlanets.Last().Key;
         }
         public string ClosestToTheSun()
         {