And the way that this diagram, or the way that we're attempting to do it, is by splitting it into four rectangles. And so we could call this rectangle one, this is rectangle two, rectangle three, and rectangle four. And each of their heights, let's see, the interval looks like they each have a width of two, so they're equally spaced. 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.