Instructions: Based on the flows provided, use the narrative provided, using LucidChart to prepare a context diagram, logical DFD, physical DFD, and a flow chart. Explain the importance of using a context diagram, a physical dataflow diagram, a logical DFD and a flow chart. 

Flow 1: Invoice received from vendor

Flow 2: Accounts Payable invoice notice sent to general ledger

Flow 3: Approved voucher (payment request) sent to cashier (3a) and to general ledger (3b)

Flow 4: Payment (e.g. check) sent to vendor by cashier (4a), paid voucher (payment notice) returned to the accounts payable department (4b), payment notice sent to the general ledger (4c)