кто ответит тому 50 рублей на счет(3.3.5

1 If the weather had been fine last week, we would have gone out.
b)we should played tennis
c) we would swum in the river.

2 If I came to Australia, I would be happy.
b) I would have a nice house
c) I would change my life

3 If I were the Presedent, I would  have stop the pollution. 
b)I would reduce the car production.
c)I I would control the waste disposal