A family consists of a father, a mother, and two children. The father is a banker, the mother is a chef, and one child is a student. If the other child is not a student, what is the profession of the second child?
In a family, there are four members: P, Q, R, and S. P is the father of Q, Q is the sister of R, and S is the mother of R. Who is the eldest member of the family?