help me asap less than an hour pls

Current Attempt in Progress Using the method of cylindrical shells, set up but do not evaluate an integral for the volume of the solid generated when the region R in the first quadrant bounded by the graphs of y = v81 -x3. y = 0, and x = 0 is revolved about (a) the line x = 9 and (b) the line y = -9. (a) Ov = 2x(9 - x)(81 -x3 ) ax ov 2n(9 + x)V/81 - x dix Ov= 2x(9 - x)V/81 - x3 dx OV = #(9 - x)V/81 - x dx (b) OV = 2x(9 - y)(81 - yz ) dy Ov = 81 *(9 + y)/81 - yay OV = 2 x(9 + y)\\/81 - yay v = 18. 20(9 + y)\\/81 - > dy