1. Charge is distributed uniformly along the z-axis with density rL0 C/m. Using Gauss' law for the electric field, find the electric field intensity due to the line charge.
2. Charge is distributed uniformly with density r0 C/m3 within a spherical volume of radius a m and having its center at the origin. Using Gauss' law for the electric field, find the electric field intensity both inside and outside the charge distribution.