如下图，是几道抽象和接口的java题目，麻烦帮忙看看！

Question

1、使用多态实现主人给宠物喂食功能，给Dog喂食，其健康值增加3，输出吃饱信息；给Penguin喂食，其健康值增加5，输出吃饱信息。2、在第一题基础上添加主人与宠物玩耍功能，与Dog则玩接飞盘游戏；与Penguin则玩游泳游戏。3、编写图形接口，包含“画”（draw）的方法，然后编写三角、正方形类实现图形接口，分别实现“画”的方法。使用图形接口接收三角形的实例和正方形的实例，并调用接口的draw方法4、某汽车租赁公司出租多种车辆，车型及租金情况如下：

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Answer 1

public abstract class Pet {protected int hValue;protected static final int PENGUIN_VALUE = 5;protected static final int DOG_VALUE = 5;abstract void addHV();abstract void play();public int gethValue() {return hValue;};}/*dog*/public class Dog extends Pet {@Overridepublic void addHV() {hValue = DOG_VALUE;System.out.println("dog full");}@Overridevoid play() {System.err.println("pick a frisbee");}}/*Penguin */public class Penguin extends Pet {@Overridepublic void addHV() {hValue = PENGUIN_VALUE;System.out.println("penguin full");}@Overridevoid play() {System.out.println("swimming");}}public class Owner {void feed(Pet pet) {pet.addHV();}void play(Pet pet) {pet.play();}public static void main(String[] args) {Owner owner = new Owner();Pet dog = new Dog();Pet penguin = new Penguin();owner.feed(dog);owner.feed(penguin);owner.play(dog);owner.play(penguin);}}