How is W related to Y?
Statement I - W is the son of Y's grandfather X.
Statement II - The sister of Y is the mother of W's son Z.
Among P, Q, R, S, T, and U, who is the heaviest?
Statement I - P is heavier than T and U and he is the second heaviest in the group.
Statement II - S is heavier than Q but not the heaviest.
If A + B means A is the mother of B; A - B means A is the brother of B; A % B means A is the father of B, and A \(\times\) B means A is the sister of B, which of the following shows that P is the maternal uncle of Q?