Determine each of the following in spherical coordinates. (a) (x2 + y2 + 22)-1/2 (b) x2 + (y + 2) (y - 2) + (2+ 2)2 (c) (202 + y2 + 2 2 )-1/2 Clearly write your answers (show all your work) to these questions on a piece of paper