Describe object-oriented design for a computer system for a library. Libraries must keep track of borrowers (customers) and inventory. Talk about the IS-A and HAS-A relationships, inheritance and different types of media (CDs, books, movies, puzzles, etc.) and some of the functions you might implement. Also, discuss some simple database design of a couple of key concepts (like customers and media). Finally, give a code sample of several objects and an interesting function, like “check out media” or “return media.”