= Use both the washer method and the shell method to find the volume of the solid that is generated when the region in the first quadrant bounded by y=x, y=25, and x=0 is revolved about the line x=6. Set up the integral that gives the volume of the solid as a single integral if possible using the disk/washer method. Select the correct choice below and fill in any answer boxes within choice. (Type exact answers.) OA. D. dx OB. dy