Review the data flow diagrams you developed for questions in the Petrie Electronics case at the end of chapter 7 (or diagrams given to you by your instructor.) Study the data flows and data stored on these diagrams and decide whether you agree with the team’s conclusion that only six entity types needed are listed inn the case and in PE figure 8-1. If you disagree, define additional entity types, explain why they are necessary and modify PE figure 8-1 accordingly.

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