• Assume in a XYZ university, there are multiple libraries, and each library has multiple members (referred to as students). • Students can become members to multiple libraries by paying appropriate membership fee. • Each library has its own set of books. • Within the library these books are identified by a unique number. • Students can borrow multiple books from subscribed library. • The student orders the books through a library from where he/she is a member. • Students can order books using inter-library loan. (This can be useful if a student wishes to borrow books from a library where he/she is not a member.) Requirements to be met: 1. Identify the Entities 2. Identify the Relationships between Entities a. One to One b. One to Many c. Many to Many 3. Identify the key attributes. 4. Draw The ER-Diagram