10. An engineer at Kreamy Krisp is studying the parametrization by r(0, $) = ((3 + cos 0) cos , (3 + cos 0) sin , sin 0). (a) Sketch the surface, and indicate a few grid curves. (b) Find the surface area of the donut. (c) Compute the integral JJ (sin(x) + sin(sin(y) + sin sin(sin(z) ))) dS. Hint: ovpuErpia