Q6) Answer the following: [2 Marks]

a) Write a small code fragment that generates a random integer number using Random class

. b) How do you check whether a given key is contained in a map?

(Give a Java code example.)

c) Create a class MapTester. In it, use a HashMap to implement a phone Book. In this class, implement two methods: public void enterNumber(String name, String number) public String lookupNumber(String name) The methods should use the put and get methods of the HashMap class to implement their functionality