For each scenario, determine which control activity is violated. Control activities include separation of duties, physical controls, proper authorization, employee management, reconciliations, and performance reviews. If no control activity is violated, select "none."

$3-$ At the end of each day, a single employee collects all cash received from customers, records the total and makes the deposit at the bank

$4-$ At the end of the year only, the company compares its cash records to the bank's records of cash deposited and withdrawn during the year

$6-$ All employees have the authority to refund a customer's money