In a family, there are three siblings: X, Y, and Z. X is older than Y but younger than Z. If Z is a doctor and Y is a teacher, what is X's profession if he is neither a doctor nor a teacher?
A family consists of a mother, a father, and their three children: P, Q, and R. The mother is a nurse, the father is an engineer, and P is a student. If Q is older than P and R is younger than P, what can be inferred about R's age compared to Q?