3. (5 points) Find the volume of the solid by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. x=1+y,y =x-3; about the y-axis 4. (5 points) Find the volume of the solid by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. y = x2 +1,y=9-x2; about the y = -1