Finished

AliceAndBobEngine.java

@@ -10,7 +10,9 @@ public class AliceAndBobEngine {
      * @return `true` if `input` is "Alice"
      */
     public Boolean isAlice(String input) {
-        return null;
+        if (input == "Alice"){
+        return true;}
+        else { return false;}
     }
 
     /**
@@ -19,18 +21,23 @@ public Boolean isAlice(String input) {
      * @return `true` if `input` is "Bob"
      */
     public Boolean isBob(String input) {
-        return null;
+        if (input == "Bob"){
+        return true;}
+
+        else {return false;}
     }
-
-    /**
+        /**
      * return `true` if the input value is "Alice" or "Bob"
      * @param input - this value is variable: it has the potential to be many things
      * @return `true` if `input` is "Alice" or "Bob"
      */
     public Boolean isAliceOrBob(String input) {
-        return null;
+        if (input == "Alice"|| input == "Bob"){
+            return true;  
+        }else return false;
     }
-
+
+
     /**
      * if the input value is "Alice" or "Bob", then
      *      return "Hello PERSONSNAME!",
@@ -41,7 +48,16 @@ public Boolean isAliceOrBob(String input) {
      * @param input - this value is variable: it has the potential to be many things
      * @return respective String value
      */
-    public String getGreeting(String input) {
-        return null;
-    }
-}
+
+        public String getGreeting(String input){
+           //String[] strangerName = "Leon Dolio Kris Nobles Desa Lossie Nancy".split(" ");
+
+            if (input == "Alice"){
+                return "Hello, Alice!";
+            } else if (input == "Bob"){
+                return "Hello, Bob!";
+            }   else {return "Begone, " +input + "! You're a stranger!";}
+
+
+    } 
+}