In a coded relation, if P ÷ Q means P is the father of Q, P - Q means P is the son of Q, and P + Q means P is the daughter of Q, what is the relationship of R if P ÷ Q + R?
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 father of Y, what is the relationship of Z if X - Y × Z?
In a coded relation, if M + N means M is the uncle of N, M - N means M is the aunt of N, and M × N means M is the brother of N, what is the relationship of O if M + N × O?