Cornick, Inc. sells office products to businesses in the eastern region of the United States. Each month, the IT division at Cornick prints monthly statements and sends them to the accounts receivable (AR) department, where a clerk mails them to the customers. Cornick's customers mail their payments back to Cornick, where a clerk in AR batches the checks and sends them to the cashier. The AR clerk then uses the payment stub to enter the payments into the computer, where the AR master data are updated to record the payment.
Using the below table of entities and activities, construct a context diagram and a physical DFD diagram.
Entities Activities
IT Department Printing monthly statements and sending to AR department
AR Department (Clerk) Mailing monthly statements to customers
Customers Payment mailed to AR Department
AR Department (Clerk) Checks sent to cashier in batches
AR Department (Clerk) Record payments into the system
AR Master Data Updated by Clerk