My parents are reading a book now. сделать 5 типов вопросов (отрицание, общий вопрос, специальный, альтарнативный, разделительный)

Aren't my parents reading a book now?
Are my parents reading a book now?
What are my parents reading now?
Are my parents reading a book or a magazine now?
My parents are reading a book now,aren't they?