QUESTION4 Articlelndex com is a company that produces indexes of magazine and penodical articles for a given disopline. A Web usei shouldi be able to entor an article topic or authors and receive a detailed list of all the articles and penodicals in which the topic was found Each article may have many authors TURN OVER] INY401 OCTNOV 2017 and each author may wnite many articles An articie may be found in only one penodical, but each penodical wil usually contain many articles Each article may have many topics, and each topic may be in many articles Draw an entity relationship diagram in the third normal form for the articles, authors, periodicals, and topics 4.1 4.2 Identify the primary and foreign keys for the entity-relationship diagram (15) 120)