Class Diagram Exercise 2.2: create a diagram Consider this system description for a book publisher: "A book is written by one or more authors who could be working on other books, too. A book consists of chapters. Each chapter, as it is written, will briefly need a proofreader to review it. Each book has an editor who manages its publication. Both editors and proofreaders are kinds of employee at the publisher." Represent this as a UML Class diagram. Recommended class names are in bold. You should include at least one of each of the relationships shown in this section. Not enough information is given to be sure of properties or methods; but you could suggest some if you wish