And we see that that is indeed the case. Over this entire interval, the second derivative is indeed negative. Now what happens as we start to transition to this upward opening u part of the curve? Well, here the derivative is reasonably negative. It's reasonably negative right there. But then it starts to get, it's still negative, but it becomes less negative and less negative and less negative, less negative and less negative and less negative. Then it becomes 0 right over here.