John, Amy and Peter are good friends. One of them is a merchant. One of them is a student. One of them is a soldier. In addition, we know following situations: Peter's age is larger than soldier's. Student's age is smaller than Amy's. John's age is different from that of student's. Who is the student?
Age: Tuổi; Larger than: Lớn hơn; Smaller than: Bé hơn; Different from: Khác.