AAA Electrical, Inc. sells electrical parts to electrical contractors in the southeastern US. AAA Electrical customers mail their payments - attached to the stub (i.e. remittance advice (RA) from their monthly statements - to AAA Electrical accounts receivable office (AR). An AR Clerk confirms that the check amount agreees with the amount on the RA and sends the checks to the cashier. The AR clerk prepares batc totals of the customer numbers, invoice numbers, and the amount paid. The AR clerk then enters the batch totals and RA's into the computer, where the AR master data are updated to record the payment. The computer reconciles the batch totals, confirms job completion, and reports discrepancies, if any, to the AR clerk.

a. Prepare a table of entities and activities

b. Draw a context diagram

c. Draw a physical data flow diagram

d. prepare an annotated table of entities and activities. indicate on this table the groupings, bubble numbers, and bubble titles to be used in preparing a level 0 logical DFD

e. Draw a level 0 logical DFD.