I have to find the volume of the given solid "enclosed by the cylinders z=x^2, y=x^2, and the planes z=0, y=4. But I'm not sure it makes sense. z=x^2 and y=x^2 aren't cylinders, though, they are parabolas. And they don't actually "enclose" any area, do they? Maybe I'm drawing it wrong, but I just can't make sense of it.