Describe the relationships between a context diagram, as in Figure (a), and the top-level diagram of a data flow diagram, as in Figure(b).

D5 Receipts Matching Purchase Order Matching Stock Receipt Slips- - 1.0 Approve Invoice 2.0 Update Vendor Account Balance Vendor Invoice Approved Approved Invoice Invoice Old Account ! Vendor D3 Account VendorI Halan D2l Payable Invoice Account Account Balances Check 4.0 Prepare Vendor New Checking Balance Check Register, G/L Summary I System Boundary Checking Balance Register Checking Account Accounting Invoices ACCOUNTING Payable Summaries ACCOUNTS PAYABLE Purthase Orders Vendor Information, Stock Receipts Checks PURCHASING Glected Invoice