1. Write a relational algebra expression for each of the following operations:

a) Find the IDs of all the students who are enrolled in COMP 314.

b) Find all distinct names of students who are enrolled in COMP 314. In other words, show each name only once (i.e., eliminate duplicate student names).

c) Find the IDs of all the students who are enrolled in COMP 314 or COMP 414.

d) Find the IDs of all the students who are enrolled in both COMP 314 and COMP 414.

e) Find the IDs of all the students who are enrolled in COMP 314 but not COMP 414.

f) Find all names of students with student IDs in the range [A, B].

Consider a student database with the following schema: Students (SID, sName); Courses (cID, Name); Enrolled (sID, ID, sectID, grade) where foreign key (SID) references Students, foreign key (CID) references Courses