java programming language/ interface and abstract OOP

Question

1. Part I
2. Write an interface for a Bank application.
3. Part II
4. Write an abstract class for the interface written in Part I.
5. Part III
6. Write a Branch class from the abstract class written in Part II.

*deadline is after 2 hours

Answer 1

interface BankApp

{

}

abstract class BankAppRec

{

}

class BankBranch extends BankAppRec

{

}