all tests pass

src/main/java/rocks/zipcode/io/quiz3/collections/Lab.java

@@ -5,7 +5,7 @@ import rocks.zipcode.io.quiz3.objectorientation.enums.LabStatus;
 /**
  * @author leon on 10/12/2018.
  */
-public class Lab {
+public class Lab implements Comparable {
 
     String name;
     String labStatus;
@@ -38,4 +38,12 @@ public class Lab {
     public String getName() {
         return this.name;
     }
+
+    @Override
+    public int compareTo(Object o) {
+        Lab obj = (Lab) o;
+        if(this.getName().charAt(0)> obj.getName().charAt(0)) return -1;
+        return 1;
+
+    }
 }

src/main/java/rocks/zipcode/io/quiz3/collections/Student.java

@@ -41,14 +41,18 @@ public class Student {
                 return map.get(l);
             }
         }
-        throw new UnsupportedOperationException("Method not yet implemented");
+       // throw new UnsupportedOperationException("Method not yet implemented");
+        return null;
     }
 
     @Override
     public String toString(){
         String result = "";
         for (Lab l: map.keySet()) {
-            result = l.getName() + " > " + getLabStatus(l.getName()) + "\n" + result;
+            if(result.equals("")){result=l.getName() + " > " + getLabStatus(l.getName()) + "\n";}
+            else if (l.getName().charAt(0)<result.charAt(0))
+            {result = l.getName() + " > " + getLabStatus(l.getName()) + "\n" + result;}
+            else {result += l.getName() + " > " + getLabStatus(l.getName()) + "\n";}
         }
         return result.substring(0, result.length()-1);
     }

src/main/java/rocks/zipcode/io/quiz3/generics/ArrayUtility.java

@@ -1,5 +1,6 @@
 package rocks.zipcode.io.quiz3.generics;
 
+import java.util.Arrays;
 import java.util.function.Function;
 
 /**
@@ -13,18 +14,32 @@ public class ArrayUtility<SomeType> {
     }
 
     public SomeType findOddOccurringValue() {
+        for (SomeType thing: array) {
+            if(getNumberOfOccurrences(thing)%2==1) return thing;
+        }
         return null;
     }
 
     public SomeType findEvenOccurringValue() {
+        for (SomeType thing: array) {
+            if(getNumberOfOccurrences(thing)%2==0) return thing;
+        }
         return null;
     }
 
     public Integer getNumberOfOccurrences(SomeType valueToEvaluate) {
-        return null;
+        Integer i = 0;
+        for (SomeType thing: array) {
+            if(thing.equals(valueToEvaluate)) i++;
+        }
+        return i;
     }
 
     public SomeType[] filter(Function<SomeType, Boolean> predicate) {
-        return null;
+
+        Class classDeclare = array[0].getClass().getComponentType();
+        SomeType[] arr =  (SomeType[]) Arrays.stream(array).map(predicate).toArray();
+
+        return arr;
     }
 }