The Business Systems and Analytics department at Tiny College has 6 instructors that can handle up to 30 students per class. The department offers five Analytics courses, each of which may generate several classes. If a class has fewer than ten students, it will be cancelled. Therefore, it is possible for a course not to generate any classes. Each class is taught by one instructor. Each instructor may teach up to three classes or may be assigned to do research only. Each student may take up to four classes per year.

Given that information, do the following:

12. Define all the entities and relationships. Describe each relationship in terms of connectivity, cardinality, and existence dependence.