If X * Y means X is the son of Y, X + Z means X is the sister of Z, and Y - Z means Y is the mother of Z, what is the relationship of Z to X in the expression X * Y + Z?
If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the mother of B, what is the relationship of C if A + B × C?
In a coded relation, if M + N means M is the aunt of N, M - N means M is the uncle of N, and M × N means M is the grandmother of N, what is the relationship of O if M + N × O?
If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C × B?