C. [10 pts] Use the washer method to show that the volume of the donut is given by the integral below. V=f_:n[(h+m)\" (hWe In order to receive full credit, you must draw an appropriate horizontal or vertical alive on the image below that, when revolved, forms a washer and label the inner and outer radii. SI 4. D. [5 pts] Simplify the volume integral above. Then, explain how symmetry can he used to conclude that V = farm/Wee. D