Consider a simple student registration. Specifically we want to support the tasks of students registering for or withdrawing from a class. To do this, the system will need to record data about what entities? What specific data about the entities will need to be stored? What is the cardinality between students and courses? Diagram the data model.

The local library wants to update its book check process. To do this, the system will need to record data about what entities? What specific data about the entities will need to be stored? Diagram the data model.