Problem $2$: The entity type STUDENT represents any university student. ACTIVITY represents some campus$-$based activity in which the student may participate. A student may participate in zero or more activities, and an activity may have zero or more students participating in it$.$ PARTICIPATION is the associative entity that represents one student participating in one particular activity. No$\_$years is an attribute of PARTICIPATION. Each student has a unique ID and name; and an activity has a unique ID and activity name.