tables below to answer questions 6-10. instructor teaches ID name manme course id sec idsemester war 2009 salary 10101 Srinivasan Comp. Sci. 65000 Finance 90000 40000 Fall 2121 Wu 15151 Mozart Music 10101 CS-101 10101 CS-315 1 Spring 2010 2009 22222 EinsteinPhysics 95000 32343 El Said History 60000 10101 CS-347 Fall 12121 FIN-201 Spring 2010 151 MU-199 22222 PHY-101 1 Spring 2010 2009 Fall 6. and the course id. Find the names of all instructors in the Art department who have taught some course Write the query using SQL. 7. Find the names of all instructors with salary between $90,000 and $100,000 (that is, 2 $90,000 and s $100,000) 8. Find the average salary of instructors in the Computer Science department. 9. Find the number of tuples in the course relation. 10. Find the salaries of all instructors that are less than the largest salary