An infinitesimally thin metallic cylindrical shell of radius 4.00 cm is centered on the z-axis, and has an evenly distributed charge of 100 nC per meter length of shell.
(a) Determine the value of the surface charge density on the conductive shell
(b) Plot Dρ as a a function of radial distance from the z-axis over the range 0<=ρ<=12 cm.