Been stuck on this question for a while i think it uses combinations, i could be mistaken, any help or solutions would be appreciated. well anyways:

A class coinsists of 8 girls and 6 boys. Acomitee is to be formed coinsisting of 4 girls and 2 boys. In how many ways can a teracher choose the comitee if:

A.) Freddie the principals son has to be on the commitee? (Answer 350)

B.) The twins Jack and Jill are both on the comitee?(350)

C.)The twins Jack and Jill cannot be on the comitee? (875)