Develop a$$level$-0$ physical DFD$$for the following business process:

TTD$,$ a vendor, sends an invoice to VCU for data warehousing support services. The$$invoice is sent directly to Anderson Longstreet, the accounts payable clerk, who records the invoice in the accounts payable file. Once the invoice is recorded, it is forwarded to$$Mary Johnson, the cash disbursements clerk, for processing. Mary prepares a check to pay the$$invoice and sends the check and invoice to Jackson Sternburg, the company treasurer. Jackson approves$$and signs the check and cancels the invoice. Jackson then mails the check to TTD and returns the canceled invoice to Mary for recording in the cash disbursements file.