Five statements about checksum error checking are given below, but they are not in the correct order. Put the statements into their correct sequence.

i if the two checksum values don't match, the receiving computer requests the data to be re-transmitted il the sending computer sends a block of data together with the checksum value iii the receiving computer uses the block of data it receives to re-calculate the checksum using the same method as the sending computer iv the two checksum values are compared by the receiving computer v the sending computer uses the block of data to calculate the checksum using an agreed method