Java abstract class extending abstract class - do I need to declare abstract methods in 2nd abstract class?

Hi,

I'm writing some Java classes and I would like to have the following structure:

abstract class submittedForm

abstract class submittedFormType extends submittedForms

class formA extends submittedFormType

Question:

A: Is this a valid way to design my code with an abstract class extending an abstract class?

B: If I declare an abstract method in submittedForm, can I wait to implement that method in formA, or do I also need to reference that abstract method in the submittedFormType abstract class as well?

Thanksin advance,
Courtenay