A section can be scheduled for no classroom or many classrooms for semesters.

However, one classroom can participate in many schedules, one schedule, or no

schedule; one time slot can participate in many schedules, one schedule, or no

schedules. You are required to keep track of semester and years of each schedule.

Hint: What kind of a relationship is $$schedule$($unary$,$ binary, or ternary$)?$

Hint: How many entities are required to schedule?

Hint: How do you keep track of schedule details? Is there an entity specifically for

this purpose?