Can someone please explain it to me ASAP??!!! This is Volume by Shells

Part 1 of 3 Points: 0 of 1 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 = x2, y = 16, 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 your choice. (Type exact answers.) O A. ( ) dx O B. JO dy