A family consists of a father, a mother, and two children. The father is a doctor, the mother is a teacher, and one child is a student while the other is a musician. If the musician is older than the student, who is the musician?
In a group of five friends: Alice, Bob, Charlie, David, and Eva, Alice is taller than Bob but shorter than Charlie. David is shorter than Eva but taller than Bob. Who is the tallest among them?
In a family, there are four members: P, Q, R, and S. P is the father of Q, Q is the mother of R, and S is the sister of Q. What is the relationship of S to R?