Well, this blue graph out here, notice it's positive. So if this were the derivative of the left graph, then that means that the left graph would need a positive slope out here, but it doesn't have a positive slope. It's a slightly negative slope becoming super negative. And so right here, we're slightly negative, and then we become very negative. And so maybe this is, let's call, let's call this F, and maybe this is F prime. This is F prime right over here. And now let's look at this middle graph.