So y, the blue one right over here is y is equal to g of x. And like we did in the last video, I wanna think about the volume of the solid of revolution we will get if we essentially rotate the area between these two, and if we were to rotate it around the x-axis. So we're saying in very general terms, this could be anything, but in the way we've drawn it now, it would literally be that same truffle shape. It'd be a very similar truffle shape where on the outside it looks like a truffle, on the outside it looks like something like a truffle, and on the inside we have carved out a cone. Obviously this visualization is very specific to the way I've drawn these functions, but what we wanna do is generalize at least the mathematics of it. So how do we find a volume? Well, we could think of disks, but instead of thinking of disks, we're gonna think about washers now, which is essentially the exact same thing we did in the last video mathematically, but it's a slightly different way of conceptualizing it.