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2. Given class A1, A2, A3 below, what gets printed after executing the following code: Answer: package a3; class A1 ( int age = 20; public String toString() { return "years"; } public int getAge ( ) { return age; } public void updateAmount (float f) { f public void updateAge (int i) { age; } age = i; } class A2 extends Al ( { updateAmount (25); } public A2() public String toString() { } return "age: " + ( getAge () ); public class A3 ( public A3() { } { A2 b new A2 (); Al a new Al(); System.out.println(a + " System.out.print( b); } public static void main(String[] args) A3 a new A3(); = Al b new Al(); System.out.println (b.getAge () ); System.out.println(b + " = " ); System.out.print (b.age +1+ "old" );