Answer:
1) Yes, Publisher relation should have a publisherID primary key.
2) NOT NULL and UNIQUE for the BookID, BranchID, CardNumber and name of the borrower in the Book, Book_Copies, Library_branch, and Borrower relations respectively. The DueDate field of the book_loan relation must be a time constraint. The BookID of the Book relation must be serial number for automatic addition and update of bookid across the database.
Explanation:
The Publisher relation should have primary key publisherID which should replace the publisherName in the Book relation to easily make a join query and attain a third-level database model.
Create the computer, network, and communication systems that an organization needs
The first challenge is that there is not electric conection.So the computer won't be able to function.Also there will be noone who will be able to use it due to the lack of education.Plus there will not be internet connection , limitting the abilities of the computer to the very basics.In addition there will not be any tools or spare parts in order to fix a computer.Finally even if thete were spare parts there woul not be someone able to gix the computer.
I hop I was helpful.Let me know if you need anything else.
Functionally, not a lot. An object is an associative array basically. As objects, they inherit different properties.
