As a system analyst, you are requested to develop an entity-relationship diagram of business order process of purchasing a textbook from a bookstore. One customer can place one or many orders for one or many textbooks at the bookstore. The bookstore, then, provides one or many textbooks to a customer. If the textbook is not available, a supplier can provide one or many textbooks to the bookstore.

Draw the E-R relationships of the above case scenario.