So it's going to be, let me write it. It's gonna be pi over two times, I'll just write it, what's one minus x squared? Let me just expand it out for fun right over here. So that's going to be, that's the same thing as x minus one squared, so it's gonna be x squared minus two x plus one, and then two squared is four, over four, and instead of delta x, I'm gonna write dx now. I'm gonna write dx, because I'm taking the limit as these become infinitely small, and I have an infinite, and I'm summing an infinite number of them. So the volume is just going to be, we just have to evaluate this definite integral, and if you feel so inspired, if you feel inspired at the moment, feel free to pause and try to evaluate this definite integral. So let's just take some of these constants out.