Two features of internal control are presented in the following sections. Each is followed by a list of four irregularities that occurred in processing data. Identify the one irregularity from each list that would be discovered or prevented by the feature of internal control described. a. The sum of the balances of the accounts in the customer's ledger is compared at the end of each month with the balance of the accounts receivable account in the general ledger by a person who has no responsibility for maintaining either the general ledger or the customers ledger. Five hours of services were rendered but the customer was only billed for four hours. A cash receipt of $750 was recorded