1. Find the titles of courses in the Comp. Sci. department that have 3 credits.
2. Find instructor pairs such that both instructors in a pair have the same salary.
3. For each instructor, their name, their salary, and the number of instructors who earn more than they do.
4. Find the names of all students who have taken at least one Comp. Sci. course. Make sure there are no duplicate names in the result.
5. Find the ids of all students who were taught by an instructor named Einstein; make sure there are no duplicates in the result.
6. Find the names of all students who were taught by an instructor named Einstein; make sure there are no duplicates in the result.
7. How many instructors work at the university
8. Department names and the number of people in that department.