Physics motion question?

a farmer uses pulley to lift hay ables into the loft of his barn. each bale of hay has a m of 35kg. his son helps unload and stack the bales on top. at the end of the day the son decides to ride down while the last bale goes up. calculate the speed with which he hits the ground if he has a m of 55 kg and the hay loft is 9.5m off the ground