Draw an ERD for the following situation. (State any assumptions you believe you have to make to develop a complete diagram.) Also, draw a data model for this situation using the tool you have been told to use in your course:

Stillwater Antiques buys and sells one-of-akind antiques of all kinds (e.g., furniture, jewelry, china, and clothing). An item number uniquely identifies each item and is also characterized by a description, asking price, condition, and open-ended comments.

Stillwater works with many different individuals, called clients, who sell items to and buy items from the store. Some clients only sell items to Stillwater, some only buy items, and others sell and buy.

A client number identifies a client and is also described by a client name and client address. When Stillwater sells an item in stock to a client, the owners want to record the commission paid, the actual selling price, sales tax (tax of zero indicates a tax-exempt sale), and date sold. When Stillwater buys an item from a client, the owners want to record the purchase cost, date purchased, and condition at time of purchase.