Ashton Auto Place is a car dealer for new as well as used cars of all makes. It uses computerized Transaction Processing System (TPS) to process car sale transactions. Whenever Salesperson sells a Car, the Salesperson enters sales data (which includes customer information, details of the car sold, and sales information) into the TPS. The system prints sales invoice for the customer, daily sales statement for each Salesperson, and prints reports for management. Using the above described business scenario do following: (a). Draw the context-level Data Flow Diagram (DFD) for the TPS
(b). Identify the entities for which system need to save data into database
Then draw entity relationship diagram (ERD). using MS word