JAVA: Need help answering this weeks exercise question in Intro to Java.

Exercises 1. Given the segment of code below, explain what will be print out and how each portion of the print result is generated. public class A public void method1() { System.out.println("A 1"); } public void method2() { System.out.println("A2"); } public String toString() { return "A"; } } // end class A public class B extends A public void method2() { System.out.println("B2"); } } // end class B public class C extends A public void method1() { System.out.println("C1"); } public String toString() { return "C"; } } // end class public class D extends c public void method2() { System.out.println("D 2"); } } // end class D // Client program to use the A, B, C, and D classes. public class ABCDMain public static void main(String[] args) A[] elements = {new A(), new B(), new CO, new DO}; for (Ae : elements) System.out.println(e); e.method1(); e.method2(); } // end main }// end ABCDMain