Alright so filling in the chart isnt too hard. First subtract 18 from 25 which gets you 7 for no traffic citations, because 18+7=25, so it makes sense to fill in the gap for no traffic citations. 1st column done.
There are 9 squares, and 4 of them will be painted white, so that means that the remaining squares will be painted black. 9-4=5, so 5 squares will be painted black.