Create a simple entity-relationship diagram to model customers and inventory for a cell phone store. You should have the following entity sets: Customers, Orders, Products. Create appropriate relationships. Include appropriate attributes. Make sure to indicate primary keys for each Entity Set. Include multiplicities. Be clear about where you model the quantity of each product that an order contains (hint: function of both Orders and Products). 2) Convert the ER diagram into a set of tables (relations). Dont forget that both entity sets AND relationships become tables.