ERD 3: The data requirements of the library application are summarized as follows: BOOK entity is identified by Bookld, it has title and multiple author names. PUBLISHER entity consists of Name, Address, and Phone attributes publisher may have many phone numbers. Name is the key for the PUBLISHER. LIBRARY_BRANCH entity has Branchld as a key and Branchname attribute additionally. BORROWER entity has Browerld as key and additionally has name, address, phone attributes. Each LIBRARY_BRANCH has one or more copies of the same book. In such a case, noOfCopies attribute needs to be maintained by the relationship. A book is published by only one publisher. A book can be loaned to a borrower at a specific library branch.

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Excel

Microsoft Excel is a useful as well as powerful data analysis and documentation programme. Microsoft Excel is a spreadsheet program developed by Microsoft that is available for Windows, macOS, Android, and iOS. It includes calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).