Which control(s) would best mitigate the following threats: (2.5 marks each) I. A batch of 106 invoices were sent to the accounts payable department for weekly processing. One of the invoices did not get processed. The error was not detected until the supplier called to follow up their unpaid invoice. II. An accounts payable file was destroyed because it was accidently used to update accounts receivable. III. During the payment of a supplier invoice, the number zero (0) in the total of $63,209 was incorrectly types as the letter 'O'. As a result, the payment was not processed correctly and the organisation received a letter from the supplier refusing future supply of goods until the invoice was paid. IV. A purchasing officer of a large government department mistakenly ordered 1,000 printers rather than 1,000 printer cartridges