Amazon.com began as an online bookstore but soon diversified its product lines by adding VHSs, DVDs, music CDs, MP3s, computer software, video games, electronics, apparel, furniture, food, toys, and more.

• Amazon Merchants and Marketplace sellers are independent, third-party sellers who offer a variety of new and used merchandise. When buying from a third party, your order is fulfilled directly by the merchant, who also handles all customer service. You pay immediately, online, using Amazon Payments.
• To review an order you've placed with an Amazon Merchant, click the Your Account link at the top of any page. In most cases, you will be able to make order or payment changes within 90 minutes of placing your order, but some Amazon Payments transactions enter credit card processing immediately.
• Each Amazon Merchant has a unique returns policy. Most policies are available through the specific merchant's help page.

Construct an E-R diagram for amazon.com based on the information provided above. Document all assumptions that you make.