i need help figuring this out. i don't know how to draw the sequence diagram.

Draw a sequence diagram corresponding to your class diagram that describes the operation of a user printing out a listing of the contents of a room as described in item "c" of the scenario. Include an actor (for the user) in the sequence diagram that is allowed to send a message to an object (a Room) to initiate printing. Exercise Scenario You want to model/organize the various bookshelves in your room. Your room currently contains 2 bookshelves, but you are considering purchasing several more in the near future. Each bookshelf is positioned along one of the four walls in the room, and a maximum of two bookshelves can be placed along any single wall. You're kind of quirky, and you name each of your bookshelves. On each bookshelf are several items; items are either books or toys. Toys have a name, a manufacturer's name, and a purchase date. Books have a title, author, and publication date. Your bookshelf organization system needs to be able to do the following things add bookshelves along the various walls in the room, respecting the maximum limit of two bookshelves per wall add items to and remove items from a bookshelf a. b. c. print a listing of the contents of the entire room, or a single bookshelf for a printout of the entire room, you must print out the name of each bookshelf, which wall it is located on, and a description of each item on it for printing out details of a single bookshelf, you need to print all of the above information, but only for a single bookshelf for item details, print out the Name of the book or toy and the manufacturer's name (in the case of a toy) or the Author's name (in case of a book) e