Ex1: Suppose you have these related classes: class Pet { private String name; public String getName() { return name; } public void setName(String petName) { name = petName; } public String speak() { return "I'm your cuddly little pet."; }} // End of super class Pet class Cat extends Pet { public String speak() { return "Don't give me orders. In" +"I speak only when I want to."; // End of sub class Cat class Dog extends Pet { public String fetch() { return "Yes, master. Fetch I will."; )) // End of sub class Cat Define the Reptile class as a sub class of the Pet class. The speak method returns an empty string.