Instructions. Show all your work neatly and in order. Each problem will be graded on the readability and reasoning of your work. Write your answer in exact form (such as , ln 3, 3, etc.) Use spherical coordinates to evaluate I = E sqrt x^2 + y^2 + z^2 dV , where E is the region bounded by the sphere x^2 + y^2 + z^2 = z.