1. A class consists of 12 boys and 8 girls. In how many ways can a committee of 6 be formed if:

a) there are no restrictions?

b) there must be four girls and 1 boy?

c) there must be at least 1 boy and 1 girl?

2. Four TAB Basketball Players call a Taxi to go to a game. When it arrives, Bill refuses to sit in the front. In how many ways can the players be seated in front and back (order is not important)?