In a coded relationship, if M ÷ N means M is the daughter of N, M + N means M is the son of N, and M × N means M is the wife of N, what is the relationship of O if M ÷ O + N?
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 means A is the brother of C and C is the sister of B?