My best attempt. The x-axis hits it right over there, comes out of the center, and then this is the surface of my disk, and then this right over here is my depth, dx. So that looks pretty good. And then let me just shade it in a little bit to give you a little bit of the depth. So how can we find the volume of this? Well, like any disk or cylinder, you just have to think about what the area of this face is and then multiply it times the depth. So what's the area of this face?