Let R be the region bounded by the following curves. Let S be the solid generated when R is revolved about the given axis. If possible, find the volume of S by both the disk/washer and shell methods. Check that your results agree. 1 9 y=x, y=x in the first quadrant; revolved about the x-axis Set up the integral(s) that gives the volume of the solid as a single integral if possible using the disk/washer method. Use increasing limits of integration. Select the correct choice below and fill in any answer boxes within your choice. Adx (Type exact answers.) S JO B. dx+ dx (Type exact answers.)