This question is about a supermarket whose business involves the following parts:

(1) Customers.

(2) An existing information system that includes a database that records the data about goods including types, prices, sourcing number and sold number, an order management component that supports customers to order goods, a payment management component that supports customers to pay the bill and a resource management component that supports storing, shipping and retrieving goods.

(3) A stock of goods.

(4) Banks.

(5) Suppliers.

(6) The council of the city where the company is located. Answer all of the following questions in the context of Data Flow Diagram.

(a) Identify THREE external entities from the above description. (3 Marks)

(b) Identify THREE processes from the above description. (3 Marks)

(c) Give Two data flows including flow names and descriptions of their roles in the following format. 1: From: your answer; To: your answer; Flow Name: your answer; Description of Role: your answer. 2: From: your answer; To: your answer; Flow Name: your answer; Description of Role: your answer. (4 marks)

(d) Give TWO information management techniques that can be used to structure the data of business information system. (4 marks)

(e) Give THREE software development methods that can be adopted to analyze, design and develop this business information system. (6 marks