Assume that you are asked to design a software application for a shopping store. In this shop, the customer walks around, collects his/her needs and carries them to the salesman. The salesman takes the items from the customer one by one and calculates the total payment. Thereafter the customer is given a bill and directed to the cashier. The customer pays the bill to the cashier and receives the goods from the salesman. The shop has a storeroom and an employee who is responsible of the place. Meanwhile, the purchase section of the shop receives the orders from storeroom and buys them from producers. The distributers of the producers deliver the purchased items to the shop and receive the checks. Also, the marketing officers of producers come over the purchase section of the shop, introduce their products and accept the orders. The manager of the shop manages all purchased and sold items. He also calculates the daily profit at the end of the day. Draw a context diagram for the shopping store System. Draw a level 1 DFD for the shopping store System