1. The highest-level data flow diagram is referred to as a context diagram. A context diagram provides the reader with a summary-level view of the system (see Chapter 3). For (a-c), please draw out a context diagram to identify the activities below (you can manually draw the answers)
   1. Prepare and file a tax return with the tax owed to the Internal Revenue Service.
   2. A customer pays an invoice with a check. Accounts receivable is updated to reflect the payment. The check is recorded and deposited into the bank.
   3. A customer places an online order to purchase merchandise. The order is approved, filled, and sent to the customer with an invoice.