A is mother of B. B is sister of C. D is son of C. E is brother of D. F is mother of E. G is granddaughter of A. H has only two children- B and C.

How is F related to H?

If two marbles are picked at random, what is the probability that either both are green or both are yellow?

If four marbles are picked at random, what is the probability that one is green, two are blue and one is red?

If three marbles are picked at random, what is the probability that two are blue and one is yellow?

If two marbles are picked at random, what is the probability that both are red?

If four marbles are picked at random, what is the probability that at least one is blue?