The goal is to learn how to build the Data Model for a shopping cart website you will create in

Assignment $4.$ Your Data Model will consist of $5$ entities that store information about the

customers, the products and the purchases. The entities will be related according to the LineItem

Pattern discussed in Chapter $5.$ You will create a Data Model diagram showing how the entities

are related using MS Visio. Your diagram should use Crow's Foot Notation