Draw the memory diagrams for all variables and objects created when you run the main method below. public class Singleton { private int value; public Singleton( int value) { } this.value = value; public class Pair { private Singleton first; private Pair second; public Pair (Singleton first, Pair second) { this.first = first; this.second = second; } public class Quiz { public static void main(String[] args) { Singleton s; Pair pl, p2; new Singleton ( 99 ); p2 new Pair( s, null); pl new Pair( s, p2 );