Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and the representative disk or washer. a)y= square of x...

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and the representative disk or washer.

a)y= square of x , y=0 , x=9, about x-axis

b) y=x²,  x= y², about x= -1