Find the volume of the solid generated by revolving the region bounded by the lines and curves y = ex, y = 0, x = - 1, and x = 8 about the x-axis. . . . The volume of the resulting solid is units cubed. (Type an exact answer, using it and e as needed.)Find the volume of the solid of revolution formed by rotating about the x-axis the region bounded by the curves f(x) = 49 - x and y = 0. The volume is cubic units. (Type an exact answer, using it as needed.)