write details please be complete

Develop a Data Flow Diagram for a system a firm might use. Pick a logistics firm (real or imaginary), pick a process or system running in that firm. Explain verbally (analyze the purpose, the workings and users of this system. Then based on this analysis draw Context Level, Level 0 and Level 1 diagrams. The assignment can be (and in fact should be done in groups. Analysis, Context and Level O Diagrams must be prepared jointly, however, every member should prepare a separate Level 1 (detail) diagram individually. Grading: Analysis 40 pts Context Diagram 20 pts Level O Diagram 20 pts Level 1 Diagram 20 pts Any student failing to show his/her contribution to the groupwork might get a lower grade than the group (report) grade