Question: 4 . Does a subclass that extends an abstract class have to give implementation to all the abstract methods of the superclass? Not if the

4. Does a subclass that extends an abstract class have to give implementation to all the abstract methods of the superclass?
Not if the subclass is going to be declared abstract
Yes; an abstract parent must have abstract children
No; an abstract parent must have no children at all
Yes; all children of an abstract parent must be non-abstract

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