1. public class Car { public void m1() { System.out.println("car 1"); } public void m2() { System.out.println("car 2"); } public String toString() { return "vroom"; } } public class Truck extends Car public void m1() { System.out.println("truck 1"); a. Write a test class of the above program which contains the main method. Create object of Truck class and call m1() and m2() methods. And write the output. [10]