how many ways are there to distribute

Question

a)6 indistinguishable marbles into 6 distinguishable bowls

b)12 distinguishable marbles into 6 distinguishable bowls

c)12 distinguishable marbles into 6 disinguishable bowls so that two marbels are placed in each bowl

Answer 1

(1) 1
(b) Must each bowl have at least one marble?
(c) 12C2 * 6!

Answer 2

I think my answer to (c) is bogus. Still thinking on it.