1 We keep track for each proessor on what courses he/her teaches. A course may have multiple sessions in each semester taught by different professors. A professor must teach at least one section of one course but at most 3 sections of different courses. We assume no summer class is offered. Courses are offered only in Spring semesters or Fall semesters For example, the following is a teaching assignment for Spring 2017. CS 101 CS 291 Scssion Scssion 2 Session 1 John Smith Laura Lcc Pit Liu Session 2 Session 3 John Smith Dara Zhu Of coursc, your database need to kecp the assignments for cvery semester. Please Draw an ER diagram that represents this part of database. More specifically, you need t