Homework help - URGENT!

[Twicks]

Hey guys! I'm doing a timed worksheet for my Java class. I need help with this question:

Consider the following incomplete classes:

public abstract class MyClass
{
public void method1(int fred)
{
// implementation not shown
}

public abstract void method2(int barney);
}

public interface MyInterface
{
public void method3(int wilma);
}

Which of the following methods must be defined in a class that implements MyInterface?

I. method1
II. method2
III. method3

I only

II only

I and II only

III only

II and III only

I think the answer is method II only, because it's abstract.
What's the right answer?