Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows:

¦ The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code.

¦ Each customer of the company is identified by a unique customer number, first and last name, and Zip Code.

¦ Each part sold by the company is identified by a unique part number, a part name, price, and quantity in stock.

¦ Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded.

Design an Entity-Relationship diagram for the mail order database and build the design using a data modeling tool such as ERwin or Rational Rose.