A uniformly charged, straight filament 7.00 meter in length has a total positive charge of 2.00 C. An uncharged cardboard cylinder 2.00 centimeter in length and 10.0 centimeter in radius surrounds the filament at its center, with the filament as the axis of the cylinder.
(a) Determine the electric field at the surface of the cylinder?
(b) Determine the total electric flux through the cylinder?