Consider the interface definition below:

public interface TestInterface { abstract public int firstMethod(int a, int b); public void secondMethod(); int thirdMethod(); }

Select the two statements below that are correct.

- A class ClassA that implements this interface must have firstMethod, secondMethod and thirdMethod in its public protocol.

- A class ClassA that is to implement this interface must have extends TheInterface in its class header.

- This definition of an interface will not compile because all the methods need to be declared to be abstract and public.

- If ClassSubA is a subclass of ClassA, and ClassA implements TheInterface above, then the programmer must explicitly implement firstMethod, secondMethod, thirdMethod in ClassSubA.

- A class ClassA that is to implement this interface must have implements TheInterface in its class header or in the class header of any of its direct or indirect superclasses.