(5 Points each) Provide the Relational Algebra for each of the following query: 2. Consider the following relation with its schema: Student(sid, name, dept_name, gpa) Course(cid, name, dept_name, credits) Enrolled(sid, cid, semester, year, grade) d. Find the ID and name of each student who has taken at least one course in the CS department. e. Find the IDs of students who have taken all courses f. Find the Names of students who have taken all courses in the CS department