2. (a) Set up the following integral in spherical coordinates, compute it: \[ \iiint {R} \frac{z} {\left(x^{2}+y^{2}+z^{2} ight)^{\frac{3} {2}}} d V\] where R is the region in the first octant defined by with x + y + z 9 3 2 Set up the above integral in cylindrical coordinates, but do not compute it: (b) Find the volume of the solid bounded by - y = 5 = x - z + 2, 2 2 y = 2x