Exercise 5.12 Correct the sentences if necessary.

1. I wouldn't buy that if I were you.

2. Thad gone there if I would have enough money.

3. If Muza had finished her project on time, she would have got a better mark.

4. What would you do in his situation?

5. I would been very happy if my brother called me yesterday.

Please help me I need the answer for this questions faster
Plea i will lose 10 marks if i do not answer it.