Consider an automated library circulation system. every book has a bar code, and every bor rower has a card bearing a bar code. when a borrower wishes to check out a book, the librarian scans the bar codes on the book and the borrower's card, and enters c at the computer terminal. similarly, when a book is returned, it is again scanned and the librarian enters r. librarians can add books (+) to the library collection or remove them borrowers can go to a terminal and determine all the books in the library by a particular author (the borrower enters a= followed by the author's name), all the books with a specific title (t= followed by the title), or all the books in a particular subject area (s= followed by the subject area). finally, if a borrower wants a book currently checked out, the librarian can place a hold on the book so that, when it is returned, it will be held for the borrower who requested it (h- followed by the number of the book). explain how you would ensure a high percentage of reusable code artifacts.