diff --git a/src/main/java/com/dtcc/projects/PhoneBook.java b/src/main/java/com/dtcc/projects/PhoneBook.java
index 51400b3..c6b5aaa 100644
--- a/src/main/java/com/dtcc/projects/PhoneBook.java
+++ b/src/main/java/com/dtcc/projects/PhoneBook.java
@@ -1,14 +1,11 @@
 package com.dtcc.projects;
 
 
-import java.util.Collections;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 public class PhoneBook {
 
-    Map<String, List<String>> phoneBookMap;
+    static Map<String, List<String>> phoneBookMap;
 
     public PhoneBook(){
         this(new LinkedHashMap<String, List<String>>());
@@ -27,6 +24,47 @@ public void add (String name, String phoneNumber) {
             phoneBookMap.put(name, Collections.singletonList(phoneNumber));
         }
     }
+    void addAll(String name, String[] phoneNumbers){
+        phoneBookMap.put(name, Arrays.asList(phoneNumbers));
+
+    }
+    public static void remove(String name){
+        phoneBookMap.remove(name);
+
+    }
+
+    public static boolean hasEntry(String name){
+        return phoneBookMap.containsKey(name);
+    }
+
+    public List<String> lookup(String name){
+        List<String> lookupList = new ArrayList<>();
+        for(Map.Entry<String, List<String>> entry : phoneBookMap.entrySet()){
+            if(entry.getKey().equalsIgnoreCase(name)){
+                lookupList = entry.getValue();
+            }
+        }
+        return lookupList;
+    }
+
+    public String reverseLookup(String phoneNumber){
+        String reversekey = "";
+        for(Map.Entry<String, List<String>> entry : phoneBookMap.entrySet()){
+            if(entry.getValue().contains(phoneNumber)){
+                reversekey = entry.getKey();
+            }
+        }
+        return reversekey;
+    }
+    public List<String> getAllContactNames(){
+        List<String> allnamelist = new ArrayList<>();
+        for(Map.Entry<String, List<String>> entry : phoneBookMap.entrySet()){
+            allnamelist.add(entry.getKey());
+
+
+        }
+        return allnamelist;
+    }
 
 
 }
diff --git a/src/test/java/com/dtcc/projects/PhoneBookTest.java b/src/test/java/com/dtcc/projects/PhoneBookTest.java
index 63277e2..37d5eac 100644
--- a/src/test/java/com/dtcc/projects/PhoneBookTest.java
+++ b/src/test/java/com/dtcc/projects/PhoneBookTest.java
@@ -3,6 +3,9 @@
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.util.Arrays;
+import java.util.List;
+
 public class PhoneBookTest {
 
     @Test
@@ -14,4 +17,71 @@ public void addTest(){
         Assert.assertTrue(phoneBook.phoneBookMap.containsKey(name));
         Assert.assertEquals(phoneNumber,phoneBook.phoneBookMap.get(name).get(0));
     }
+
+    @Test
+    public void addAllTest(){
+        PhoneBook phoneBook = new PhoneBook();
+        String name = "Zan Again";
+        String[] phoneNumbers = {"1122", "34567", "134789"};
+        phoneBook.addAll(name, phoneNumbers);
+        Assert.assertEquals(Arrays.asList(phoneNumbers), phoneBook.phoneBookMap.get(name));
+    }
+
+    @Test
+    public void removeTest(){
+        PhoneBook phoneBook = new PhoneBook();
+        String name = "Zan";
+        String phoneNumber = "33333333333";
+        phoneBook.add(name, phoneNumber);
+        String name1 = "Zan1";
+        String phoneNumber1 = "333333333331";
+        phoneBook.add(name1, phoneNumber1);
+        phoneBook.remove(name);
+        Assert.assertFalse(phoneBook.phoneBookMap.containsKey("Zan"));
+    }
+
+    @Test
+    public void hasEntryTest(){
+        PhoneBook phoneBook1 = new PhoneBook();
+        String name = "Zan";
+        String phoneNumber = "33333333333";
+        phoneBook1.add(name, phoneNumber);
+        Assert.assertTrue(phoneBook1.phoneBookMap.containsKey("Zan"));
+    }
+
+    @Test
+    public void lookupTest(){
+        PhoneBook phoneBook1 = new PhoneBook();
+        String name = "Zan";
+        String[] phoneNumberList = {"33333333333", "1234", "123456"};
+        phoneBook1.addAll(name, phoneNumberList);
+        List<String> names = phoneBook1.lookup(name);
+        Assert.assertEquals(Arrays.asList(phoneNumberList), names);
+
+    }
+    @Test
+    public void reverseLookupTest(){
+        PhoneBook phoneBook1 = new PhoneBook();
+        String name = "Zan";
+        String phoneNumber = "33333333333";
+        phoneBook1.add(name, phoneNumber);
+        Assert.assertEquals(phoneBook1.reverseLookup(phoneNumber),
+                name);
+    }
+
+    @Test
+    public void getAllContactNamesTest(){
+        PhoneBook phoneBook1 = new PhoneBook();
+        String name1 = "Zan";
+        String[] phoneNumber1 = {"33333333333", "123"};
+        phoneBook1.addAll(name1, phoneNumber1);
+        String name2="Zan2";
+        String[] phoneNumber2 = {"999999999", "22222222222","44444444444"};
+        phoneBook1.addAll(name2, phoneNumber2);
+        String[] actual={"Zan","Zan2"};
+        Assert.assertEquals(Arrays.asList(actual), phoneBook1.getAllContactNames());
+    }
+
+
+
 }
diff --git a/target/classes/com/dtcc/projects/PhoneBook.class b/target/classes/com/dtcc/projects/PhoneBook.class
new file mode 100644
index 0000000..976e744
Binary files /dev/null and b/target/classes/com/dtcc/projects/PhoneBook.class differ
diff --git a/target/test-classes/com/dtcc/projects/PhoneBookTest.class b/target/test-classes/com/dtcc/projects/PhoneBookTest.class
new file mode 100644
index 0000000..084fff8
Binary files /dev/null and b/target/test-classes/com/dtcc/projects/PhoneBookTest.class differ