So this is our gene, C. And that works out mathematically because the distance between B, between B and C is three Map units and that's exactly what we want. And the distance between A and C, well, if this is five and this is three, that means the remaining is two Map units, right? Because five minus three is equal to two. And that is exactly what we are given. We are told that the percent recombination between A and C is 2%, and 2% recombination is equivalent to two Map units. So of course, these are very simple cases.