For each problem, find the area of the region enclosed by the curves. 16 ) y - 3 x, y - 2Vx, 17) y - -x - 67 - 10, y- x + 2x -1, x-0, x-4 x - -3, 1=-1 For each problem, find the volume of the solid that results when the region enclosed by the curves is revolved about the x-axis. 18) y- x 43, y - 0, x - 1, x - 2 19) y - Nx, J-0, 1= 1 For each problem, find the volume of the specified solid. 20) The base of a solid is the region enclosed by the semicircle y - V9- x and the x-axis, Cross-sections perpendicular to the x-axis are squares