помогите 3 и 4 номер пожалуйста безотлагательно!

3. Здесь необходимо видимо просто придумать предложение с вопросами-хвостиками)
1. I am the best student in my class, aren't I?
2. You can't explain this exercise for me, can you? 
3. They went to the cinema, didn't they?
4. He hasn't done his homework yet, has he?
5. She was at the party yersterday, wasn't she?
6. They were not in the library, were they?
7. There is a rabbit in my backyard, isn't there?
8. You won't go outside today, will you?

4.  1)  f
2) b
3) g