Problem 1: The following is a short statement of requirements for part of a ticket-issuing system Develop top-level use case diagram, and identify any > and/or > relationships. Incorporate them into the diagram. Problem 2: Develop a class diagram for courses, students, and instructors. Modify the diagram in order to present the fact that some courses have prerequisite c ourses. lem 3: Suppose that a book is defined by following statement: "A book is composed of a number of parts, which in turn are com d of a number of chapters. Chapters are composed of sections". Part (a): Draw a class diagram representing the book. Focus first on classes and relationships. Also, add multiplicity to the class diagram. Part (b): Extend the class diagram of part (a) to include the following attributes: A book includes a publisher, publication date, and arn ISBN .A part includes a title and a number. . A chapter includes a title, a number, and an abstract. .A section includes a title and a number Part (c): Consider the class diagram of part (b). Note that the Part, Chapter, and Section classes all include title and number attributes. Add a class and an inheritance relationship to factor out these two attributes into the class