DO 1: Identify the DFD elements in the following narrative: A customer purchases a few items from a local grocery store, Jill, a salesclerk, enters the transaction in the cash register and takes the customer's money. At closing, Jill gives both the cash and the register tape to her manager. Problem 1: Prepare flowcharting segments for each of the following operations: a. Processing transactions stored on a sequential medium such as a magnetic tape to update a master file stored on magnetic tape b. Processing transactions stored on magnetic tape to update a database c. Querying a database and printing the query result e. Using a terminal to query your customer sales database Use a terminal to enter employee hours recorded on time cards to update both the payroll transaction file and the wage data in the payroll master file