Andy gave $\frac{1}{12}$ of his stickers to Alan. He also gave $\frac{1}{3}$ and $\frac{1}{4}$ of his stickers to Ben and Charlie, respectively. He then had 96 stickers left.

a) What fraction his stickers was left?

b) How many stickers did he give to Charlie?

a)$\frac{1}{2}$

b)70

b)70

a)$\frac{2}{3}$

b)72

b)72

a)$\frac{3}{4}$

b)74

b)74

a)$\frac{4}{5}$

b)76

b)76

None of the above