And once again, if we wanted to put, if we wanted to calculate its volume, we could say there's an infinitesimal volume and it would have depth DY. And so as we've learned many times in integration, what we wanna do is think about the volume of one of these, I guess you could say slices, and then integrate across all of them. Now there's a couple of ways to approach it. You could try to integrate with respect to X or you could integrate with respect to Y. I'm gonna argue it's much easier to integrate with respect to Y here because we already have things in terms of DY. The volume of this little slice is going to be Y times X times DY. Now if we wanna integrate with respect to Y, we want everything in terms of Y. And so what we need to do is express X in terms of Y.