So we're going to rotate it around the vertical line x is equal to 2. We're going to rotate it right around like that. And we will get, if we rotate it like that, we will get this shape, so this strange-looking shape. It's hollowed out in the middle. You can kind of use the y equals x squared part kind of hollows out the middle, and it's really the stuff in between that forms the wall of this kind of rotated shape. So let's think about how we can figure out the volume. And we're going to do it using the disk method, sometimes called the ring method.