So we go from zero to eight, and we split into four sections, so each has a width of two. So they're each going to be two wide. So that's two, that's two, that's two, that's two. And their height seems to be based on, their height seems to be based on the midpoint. So between the start, between the left side and the right side of the rectangle, you take the value of the function at at the middle value right over here. So for example, this height right over here looks like f of one. This height right over here looks like f of three.