In a coded relation, if A ÷ B means A is the daughter of B, B + C means B is the father of C, and C - D means C is the brother of D, what is the relationship of D to A?
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 × Q + R?
In a coded relation, if P × Q means P is the father 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 if P × R + Q?