In a particular code language, 'A + B' means 'A is the sister of B', 'A - B' means 'A is the brother of B', 'A * B' means 'A is the wife of B', and 'A ÷ B' means 'A is the father of B'. If 'M * N ÷ P + Q', then what is the relation of M to Q?

There are three married couples in a family of three generations. A is the grandson of H; G is the mother-in-law of C; D and E are brothers. B is the only nephew of E. F is the sister-in-law of D. B is the son of C. How is B related to G?

A is the brother of B, B is the daughter of C, and D is the father of A. How is C related to D?