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?
In a coded relation, if P × Q means P is the mother of Q, P + Q means P is the daughter of Q, and P - Q means P is the son of Q, what is the relationship of R to S if R × S and S - R are true?
If X + Y means X is the uncle of Y, X - Y means X is the aunt of Y, and X × Y means X is the cousin of Y, what is the relationship of Z to W if Z - W and W + Z are true?