A three-level inheritance chain has been provided:
- Person (base class) with a protected name and getName() function
- Student (derived from Person)
- GraduateStudent (derived from Student)

Your task is to implement the printLevel() function for GraduateStudent. It should print "Graduate Student".

This demonstrates multi-level inheritance: GraduateStudent inherits from Student, which inherits from Person. The getName() function works because it is inherited through the entire chain.

Do NOT include a main function. Your code will be tested automatically.

Expected output:
Carol
Graduate Student