Please solve this question step by step and make sure to do it perfectlly please.
(1) (20 pts) Show all your work. Use spherical coordinates to evaluate the triple integral integral integral integral E (x^2 + y^2) dV where E is the solid hounded by the sphere x^2 + y^2 + z^2 = 9 and the coordinate planes in the octant with x = 0, z
