Section B Pet names ownede 1 string + Tetine stigting) gethel I String getovere string Cat numberOfTeth int Lengthofal tint Budgie colourfrather string Cat (name:string, overrane: string. brotteethiant. Lengthoftail:int) Det Number of Teeth (int VetLengthorta111 Badge inane: string, Dating colorofteathers:string) getcolour of reatherst) string 1. Convert the UML class diagram above into a java code with the following conditions The methods in the Pet class are abstract Create a class called test. The main() method in the test class should create three Car objects and two Budgie objects. The main() method should also create indirectly an object of the Per class. iii Demonstrate polymorphism in your test class. 2. Write a Java Code for a simple GUI calculator application. The program should be able to handle user errors. Use more than one layout manager in your code. 3. Implement a simple stack in java using the scenario below. Acompany wishes to keep track of the order in which it employed staff. User can enter either "1" to fire, "W" to hire or "e" to end program. When a member of staffis employed, their employee number is added to the top of a stack when someone has to be made redundant, the last person to join the company is removed from the top of the stack. Hint: Use ArrayList