Select from the option list provided the procedure the auditor could implement to test the operating effectiveness of the internal control for each of the following situations. Each choice may be used once, more than once, or not at all. Situation Answer 1. To determine that all credit sales transactions of an entity are recorded. 2. To detect a failure to post invoices to customers' accounts ledger. 3. To detect failure to invoice a shipment. 4. To ensure sales orders are properly authorized. 5. To determine goods sent to customers are based only on authorized sales orders. 6. To verify the completeness of cash receipts for cash sales at a retail outlet. 7. To ensure cash receipts are deposited