Primary and Secondary students attending Australian schools have 12 year-levels to complete. Each student is assigned to a year-level based on their age. Each school has a principal who organises various events for students throughout the year. Each school is divided into two types, primary schools (Years 1-6) and secondary schools (Years 7-12). Secondary school students are issued with a library card that allows them to borrow items from the library. Primary school students are issued with free lunch vouchers. Each year level requires the completion of a certain number of subjects. A subject with no students enrolled will not run. Each subject has a name, one or more terms in which it runs and an assigned teaching staff member.

Draw an EER diagram to depict the above scenario. Use common sense to identify all entities, attributes, relationships and cardinalities. Any many-to-many relationships, if present, must be resolved. State all assumptions made.