data gathering method

4. Why does the audit trail an important control? 5. Explain the activities commonly performed during systems analysis. 6. For each of the following, discuss which data-gathering method(s) are most appropriate and why: a. Examining the adequacy of internal controls in the purchase requisition procedure b. Identifying the controller's information needs c. Determining how cash disbursement procedures are actually performed d. Surveying employees about the move to a total quality management program e. Investigating an increase in uncollectible accounts