1. Manufacturers have a name, which we may assume is unique, an address, and many phone numbers. 2. Products have a model number and a type (e.g., television set) and may have many manufacturers, and different manufacturers may have different products with the same model numbor However, you may assume that no manufacturer would have two products with the same model number S 3. Customers are identified by their unique social security number. They may have many addresses, several customers may live at the same (physical) address, but we assume that no two customers have th same email address. A customer can place several orders. 4. An order has a unique order number, and a unique date. An order is placed by one customer. For each order, there are one or more products ordered-mind there is a quantity for each product on the order: 5. Customer pay for their orders using a credit card, customer may have many credit cards, and each payment should be done using one credit card