So the second derivative at plus or minus one is equal to zero. So either between plus or minus one or on either side of them, we are going to be, we could be concave upward or concave downward. So let's think about this. And to think about this, I'm gonna make a number line. Let me find a nice, soothing color here. All right, that's a nice, soothing color. And let's say, I should make the number line a little bit bigger.