Questions on User Administration

1.For SU01 transaction code what are the minimum authorization objects?
2.Difference between single role and composite role
3.What is the default authorization object when we create a role?
4.In which table all authorization objects will be stored?
5.In which table checked authorization objects will be stored/
6.Authorization objects customizing table are?
7.In which table minimum authorization objects are stored?
8.SU21?
9.SU24?
10.SU25?
11.Object class view table?