Сделать 5 типов вопросов с ответом, The cat is sitting on

Who is sitting on the sofa? (cat)
Where is the cat sitting? (on the sofa)
What is the cat doing with the sofa? (she is sitting on it)
Is the cat sitting on the sofa? (Yes. She is)
Isn't the sofa a great place to sit on? (I don't know, but the cat seems to like sitting on it.) лол