Calculate the potential of a infinitely long cylinder of radius a which has constant charge density p everywhere in space. your answer should be in cylindrical coordinates. b) how does the potential change if a cylinder of radius b < a is hollowed out of the middle so that the axis through their centers coincide. your answer should be in cylindrical coordinates. c) what is the electric field created in the above scenarios, use the same coordinates as the corresponding scenario. hint: a neutral volume is equivalent to overlapping charged volumes of equivalent magnitude but opposite sign.