The volume charge density inside a solid sphere with the radius of sphere a = 2 cm is given by v = o (a-r)/a, where

The volume charge density inside a solid sphere with the radius of sphere a = 2 cm is given by ρv = ρo (a-r)/a, where r is the distance of a point from the center of the sphere (as given in spherical coordinate system) and ρo = -3 nC/m. The region outside the sphere is free-space. Calculate the electric field intensity with unit vector notation and the electrostatic potential (by assuming zero potential at infinity) at r = 1 cm and r = 5 cm.