(c) The following relational schema form part of a database held for library borrowing system. BookCopy is referring to the physical copies of each book in the library. Book (BookID, BookTitle, BookAuthor, publishDate, publisherName, ISBN) BookCopy (copyNo, ISBN, Price) Borrower (BorrowID, BorrowName, BorrowPhone, BorrowEmail) Loan (BorrowlD, dateTimeOut, dateDue, dateReturned, copyNo) Identify ONE (1) weak entity based on the above relational schema. Justify your answer. (i) (ii) Explain how the entity integrity and referential integrity rules are applied to these relations.

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