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1. Library – Librarian Relationship:

The “Library” class contains a “librarian” attribute, indicating that a library has a librarian.

2. Library – Staff Relationship:

The “Library” class has a “staffMembers” attribute, indicating a composition relationship with the “Staff” class. This suggests that the staff members are part of the library.

3. Library – Book Relationship:

The “Library” class has a “books” attribute, indicating a composition relationship with the “Book” class. This suggests that the books are part of the library’s collection.

4. Librarian – Book Relationship:

The “Librarian” class has a method “issueBook(Book)” and is expected to interact with books, representing an association.

5. Member – Book Relationship:

The “Member” class has methods “borrowBook(Book)” and “returnBook(Book),” indicating an association with books.

6. Member – Subject Relationship:

The “Member” class may have an interest in certain subjects, represented by the “Subject” class. This relationship is not explicitly shown in the model, but it can be inferred based on the “Subject” class’s association with books.

7. Book – Subject Relationship:

The “Book” class has a “subject” attribute, representing an association with the “Subject” class. This indicates that a book is related to a particular subject.