True or false?

please state the true statement if its false.

5. An airplane manufacturer has a perpetual inventory system. In order to verify the inventory for the audit, it would be sufficient to check the manual entries in the inventory records, and document those entries for the audit file. 6. An acceptable system of controls must provide absolute assurances that an organization's objectives will be achieved. 7. An effective Board of Directors exercises oversight over internal control. 8. It is impossible to establish sufficient internal control in an all cash business