Draw the use case Diagram on the following Point of Sale system,
- A customer enters the supermarket. The customer takes a shopping cart or basket and strolls through the supermarket. The customer selects items from the shelves and puts them in the shopping cart or the basket. When finished, the customer brings the items to the cash register. The cashier calculates the total price of the merchandise. The customer pays for the merchandise. The cashier bags the items, issues a receipt to the customer and, if necessary, returns the change. The customer picks up the bags and leaves the supermarket.