Composition, aggregation or inheritance at a school

A school timetable program has these classes: School, Room, Club, Student and Person.

• A School object creates its own Room objects. A room only exists as part of its school, and if the school is removed from the program, so are its rooms.
• A Club holds a list of the Student objects that belong to it. Students exist before they join and stay after the club is closed.
• A Student is a kind of Person, with an extra student number.

(a) Identify the relationship between each pair: School and Room, Club and Student, Student and Person. [3]

(b) A programmer suggests making Student a subclass of Club, so a student can use the club's list. Explain why this is a poor design. [2]

[5]