For this exercise, you are going to create a part of an Animal hierarchy. Unlike some of our examples and the previous exercises, this exercise is going to have 3 levels in the hierachry. At the top is the Animal class. Below that, we are going to have a subclass for Pets. Under pets, we are going to have 2 subclasses, Dogs and Fish. You will need to create your class hierarchy and add instance variables, getters, and setter methods to accommodate the following information: . I need to save what type of animal I have (String variable) . I want to be able to save a name for my fish and dog (String variable) I want to know which fish need salt water v. fresh water (String variable) . I want to know if my dog has been trained (boolean variable) . I want to know the size of my dog and fish (String variable) Make sure you use common sense names for your variables! public class Animal public class Fish extends Pet public class Pet extends Animal public class Dog extends Pet