In a coded relation, 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 sister 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 mother of Y, what is the relationship of Z if X * Y - Z?
If A × B means A is the father of B, A + B means A is the sister of B, and A - B means A is the brother of B, what is the relationship of C if A × C + B?
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?