This is for the following class CS-432_Database Systems. Please answer the following question(s) and keep it simple. Thank you(will leave like). No need for codes, just design.

Please use UML Diagram to design a ER Model for an online shopping database system. You can take Amazon as an example, but it is much more basic.

In this database, there should be Transaction Info, Item(product) Info. Transactions can be made by members or guest buyers.

Payment Info and Shipping Info should be recorded, if a purchase is made. Product Info needs to be sufficient for user to browse and search, Transaction Info cover both purchase and return transactions.

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Please make sure to show the quantity and unit price of each item ordered. It is also very important to link a return transaction to its original purchase transaction.

Think about a possible case: One bought 1 desk ($100) and 3 chairs ($30 each), charged to one credit card. Later the buyer returned 2 chairs (refund $30x2 in total back to credit card used).