Q$3.$ Create an ERD for a university system that represents how teachers teach courses. A teacher must teach at least one course, and co$-$teaching $($i$.$e$.,$ a course taught by more than one professor$)$ is allowed for each course. A teacher may teach the same course at different campuses of a university. In this university system, the total number of times a teacher has historically taught a specific course at a specific campus $($called "TeachingCount"$)$ should be recorded.

Attributes are:

Teacher$($TeacherID$,$ TeacherName$)$

Course$($CourseID$,$ CourseName$)$

Campus$($CampusID$,$ CampusName, Address$)$

You are required to use Lucidchart to create this ERD and identify the primary key in the ERD.