In the code, if P × Q means P is the mother of Q, P ÷ Q means P is the father of Q, and P + Q means P is the son of Q, what is the relationship of R if P × R ÷ Q?
If X - Y means X is the sister of Y, X + Y means X is the brother of Y, and X × Y means X is the uncle of Y, what is the relationship of Z if X - Z + Y?
In a coded relation, 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 grandmother of N, what is the relationship of O if M + O - N?
If A ÷ B means A is the sister of B, A + B means A is the mother of B, and A × B means A is the father of B, what is the relationship of C if A ÷ C + B?