Find the volume of the solid obtained by rotating the region (in both the first and second quadrants) bounded by the given curves about the specified axis.

http://math.webwork.rochester.edu:80...b69666e6c1.png about http://math.webwork.rochester.edu:80...81d03e5971.png

I got http://math.webwork.rochester.edu:80...eb93acf621.png but seems to be wrong...