1. a. A web based library system is to be developed that provides a single interface to a number of databases of articles in different university libraries across the country. With this system, students can search for an article by either entering the title, the author's name, or the date of publication or all. The library system first searches the local university library of the student and if the said article is not available, the system then further searches libraries of other universities. The system is also used by the library staff and they provide regular maintenance of the library system such as cataloging the various articles and performing user administration. Suppliers or publishing houses also provide new articles regularly to the system. Users can either download an article and read without printing or can make their own copy by printing depending on the copy right restrictions on the said article. User's therefore first searches for an article and before the article can be retrieved, the user must agree on the displayed copyright law protecting the article and fee before the user can proceed to download the articled to read or print. The system keeps information on each article such as title, author and the fee. The source of these articles or where there were first published including the country of the publisher is also kept in the system. Each of these countries has their own copy right law which must be adhered to by the users i. ii. iii. Draw a use case diagram for this library system. Draw a ERD diagram for this library system. Draw a sequence diagram for this library system. [5 marks each]