Answer: a) 14080, b) 5280, c) 64.
Explanation:
Since we have given that
Number of teddy bears = 3
Number of identical lollipops = 9
Total number of things = 3+9 =12
Number of children = 4
(a) Without restriction?
Number of ways would be

(b) With no child getting two or more teddy bears?

(c) With each child getting three ""goodies""?

Hence, a) 14080, b) 5280, c) 64.