Accounting Information System AD Itd is well reputed adverting agency operating in muscat. AB & company, a vendor, sends an invoice to AD Itd for advertising services. The invoice is sent directly to Waleed, the accounts payable clerk, who manually records the invoice in the account's payable subsidiary ledger. Once the invoice is recorded, it is forwarded to Salim, the cash disbursements clerk, for processing. Salim prepares check to pay the invoice and sends the check and invoice to John the company treasurer. John approves and signs the check and cancels the invoice. John then mails the check to AB & B company and returns the canceled invoice to Salim for recording in the cash disbursements journal and filing. Once a week, Waleed manually posts disbursements from the cash disbursements journal to the accounts payable subsidiary ledger.

REQUIRED:

Prepare a document flowchart, a BPD, a context diagram, a Level 0 data flow diagram, and a Level 1 DFD for the AD Itd cash disbursement process?