) Calculate the potential of a infinitely long cylinder of radius a which has constant charge density rho. 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. 1 of 2 Assignment 4 Phys 9C Due April 29, 2019 c) What is the electric field created in the above scenarios?