Answer the following questions.

(b) Given the following tables for a university database, write the commands to grant or revoke the privileges as indicated in the questions. STUDENT(Student_ID, Student_Name, Major, Units) FACULTY(Faculty_ID, Faculty_Name, Dept, Position) CLASS(Course_ID, Faculty_ID, Schedule, Room) ENROLL(Course_ID, Student_ID, Grade) (1) Give privileges to read tables STUDENT and CLASS to Leena, a clerk in the dean's office. The user may also read ENROLL, but without the Grade attribute. (ii) Give privileges to read and modify tables FACULTY and CLASS to Adam, an assistant dean. This user may authorize other users to read and modify CLASS, but not FACULTY. (iii) Cancel the authorization privileges of the assistant dean, but maintain his own reading and modification privileges