I did the lab changes

AliceAndBobEngine.java

@@ -9,17 +9,21 @@ public class AliceAndBobEngine {
      * @param input - this value is variable: it has the potential to be many things
      * @return `true` if `input` is "Alice"
      */
+
     public Boolean isAlice(String input) {
-        return null;
+        return input.equals("Alice");
+
     }
+
 
+
     /**
      * return `true` if the input value is "Bob"
      * @param input - this value is variable: it has the potential to be many things
      * @return `true` if `input` is "Bob"
      */
     public Boolean isBob(String input) {
-        return null;
+        return input.equals("Bob");
     }
 
     /**
@@ -28,8 +32,17 @@ public Boolean isBob(String input) {
      * @return `true` if `input` is "Alice" or "Bob"
      */
     public Boolean isAliceOrBob(String input) {
-        return null;
-    }
+        if(input == "Alice"){
+            return true;
+        };
+
+        if(input == "Bob") {
+
+            return true;
+        }
+        return false;
+    } 
+
 
     /**
      * if the input value is "Alice" or "Bob", then
@@ -42,6 +55,12 @@ public Boolean isAliceOrBob(String input) {
      * @return respective String value
      */
     public String getGreeting(String input) {
-        return null;
+        if((input == "Alice") || (input == "Bob")) {
+            return "Hello, "+input+"!";
+        }
+        else {
+            return "Begone, "+input+"! You're a stranger!";
+        }
     }
 }
+

package.bluej

@@ -1,32 +1,78 @@
 #BlueJ package file
-editor.fx.0.height=0
-editor.fx.0.width=0
-editor.fx.0.x=0
-editor.fx.0.y=0
+dependency1.from=IsBobTest
+dependency1.to=AliceAndBobEngine
+dependency1.type=UsesDependency
+dependency2.from=IsAliceOrBobTest
+dependency2.to=AliceAndBobEngine
+dependency2.type=UsesDependency
+dependency3.from=GetGreetingTest
+dependency3.to=AliceAndBobEngine
+dependency3.type=UsesDependency
+dependency4.from=IsAliceTest
+dependency4.to=AliceAndBobEngine
+dependency4.type=UsesDependency
+editor.fx.0.height=994
+editor.fx.0.width=1920
+editor.fx.0.x=21
+editor.fx.0.y=23
 objectbench.height=101
-objectbench.width=776
-package.divider.horizontal=0.6
+objectbench.width=420
+package.divider.horizontal=0.5474358974358975
 package.divider.vertical=0.8007380073800738
 package.editor.height=427
-package.editor.width=674
-package.editor.x=181
-package.editor.y=109
+package.editor.width=682
+package.editor.x=1248
+package.editor.y=240
 package.frame.height=600
 package.frame.width=800
-package.numDependencies=0
-package.numTargets=1
+package.numDependencies=4
+package.numTargets=6
 package.showExtends=true
 package.showUses=true
 project.charset=UTF-8
-readme.height=58
+readme.height=60
 readme.name=@README
-readme.width=47
+readme.width=48
 readme.x=10
 readme.y=10
-target1.height=50
-target1.name=Main
+target1.height=70
+target1.name=IsAliceTest
 target1.showInterface=false
-target1.type=ClassTarget
-target1.width=80
-target1.x=70
-target1.y=10
+target1.type=UnitTestTargetJunit4
+target1.width=120
+target1.x=0
+target1.y=70
+target2.height=70
+target2.name=IsBobTest
+target2.showInterface=false
+target2.type=UnitTestTargetJunit4
+target2.width=120
+target2.x=140
+target2.y=90
+target3.height=70
+target3.name=IsAliceOrBobTest
+target3.showInterface=false
+target3.type=UnitTestTargetJunit4
+target3.width=120
+target3.x=140
+target3.y=320
+target4.height=70
+target4.name=AliceAndBobEngine
+target4.showInterface=false
+target4.type=ClassTarget
+target4.width=130
+target4.x=290
+target4.y=200
+target5.height=70
+target5.name=README.md
+target5.type=TextTarget
+target5.width=120
+target5.x=140
+target5.y=10
+target6.height=70
+target6.name=GetGreetingTest
+target6.showInterface=false
+target6.type=UnitTestTargetJunit4
+target6.width=120
+target6.x=0
+target6.y=270