Draw a complete EERD for the following situation.
There are graduate students at a university. The university stores the student ID, name, DOB, mailing address, and major. Some graduate students are employed by the university as teaching assistants (TAs); some are employed as research assistants (RAs); some are not employed by the university at all. For the TAs, we need to know the course assignment; for the RAs, we need to know the research grant to which they are assigned.Students cannot be both a TA and a RA at the same time.