But this x value as a function of y is just the square root of y. So it's going to be 2 minus the square root of y. And so now we can come up with an expression for area. It's going to be, and I'll just factor out, I'll leave the pi there. So it's going to be pi, I'll write it over here. It's going to be pi times outer radius squared. Well, the outer radius is 2 minus y squared.