In a coded relation, if P × Q means P is the mother 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 to S if R × S and S ÷ R are true?
In a family of five members: P, Q, R, S, and T, there are two males and three females. R is the brother of S. P is the mother of Q. T is the father of R. Who is the male member in the family?