You are a senior systems analyst at Globe Consulting, a growing IT consulting firm. You are leading the development team for a major client. You need to explain data and process modeling to your two newly hired junior analysts (Michelle and Aiden) before meeting with the client tomorrow afternoon.

1.Explain what a diagram 0 is and how it is used. (30 points)Review the order system context diagram in Figure 5-11 (see attachment), and compare it with the order system diagram 0 DFD in Figure 5-13 (see attachment). Then answer the following questions(20 points): (a) How many external entities are shown in each diagram? (b) In each diagram, how many data flows connect to the external entities?(c) How many processes are identified in the diagram 0 DFD? (d) Could the data store have been shown in the context diagram? Why or why not?

2. Explain what a diagram 0 is and how it is used. (30 points)

ORDER CUSTOMER WAREHOUSE PICKING LIST ORDER REJECT NOTICE INVOICE 0 PAYMENT COMPLETED ORDER ORDER SYSTEM BANK DEPOSIT CASH RECEIPTS ENTRY COMMISSION SALES REP BANK ACCOUNTING 1 ORDER PICKING LIST FILL ORDER ORDER REJECT NOTICE CUSTOMER WAREHOUSE 2 COMPLETED ORDER CREATE INVOICE INVOICE D1 ACCOUNTS RECEIVABLE PAYMENT DETAIL INVOICE DETAIL 3 PAYMENT APPLY PAYMENT COMMISSION BANK DEPOSIT CASH RECEIPTS ENTRY SALES DEPT BANK ACCOUNTING