And so because this total distance is five map units, placing it above B means the distance between A and C would be only two map units because five minus three is two. And so what that implies is C. The gene C must be placed below B. And that will work out because as we place it right over here, so this is our gene C. We know that the distance is 3%, so three map units. And that means this distance right over here is three map units. And the final piece of information tells us that A and C between A and C is 8%. So that's eight map units.