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9-14 Use the method of cylindrical shells to find the volume of the solid obtained by rotating the region bounded by the given curves about the x-axis. 9. xy = 1, x = 0, y = 1, y = 3 10. y = Vx, x = 0, y = 2 11. y = x3/2, y = 8, x=0 12. x = -3y2 + 12y - 9, x=0 Jobulor nity 13. x = 1+ (y -2)?, x=2 14. x + y = 4, x =12 - 4y+4 15-20 Use the method of cylindrical shells to find the volume generated by rotating the region bounded by the given curves about the specified axis. 15. y = x', y = 8, x = 0; about x = 3 16. y = 4 - 2x, y = 0, x = 0; about x = -1 17. y = 4x - x2, y = 3; about x = 1 18. y = Vx, x = 2y; about x = 5 19. x = 2y2, y = 0, x = 2; about y = 2 20. x = 2y2, x = yz + 1; about y = -2 bil