Question: A payroll data flow diagram has a data store called Accumulated Salary Data. At one stage in the DFD , a process Calculate YTD -

A payroll data flow diagram has a data store called Accumulated Salary Data. At one stage in the DFD, a process "Calculate YTD-Taxes" gets data from that data store, updates it in the process, and writes it back out. The diagram should show:
A single line with arrows on both ends labeled YTD Payroll Details
A dashed line with arrows on both ends labeled YTD Payroll Details
A line out of the data store labeled: Current YTD Payroll Details; and a line into the data store labeled: Updated YTD Payroll Details
Two separate data flow lines but each with the same name YTD Payroll Details
Two dashed lines but each with the same name of YTD Payroll Details

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