A cylindrical shell of radius 7.00 cm and length 2.23 m has its charge uniformly distributed on its curved surface. The magnitude of the electric field at a point 21.3 cm radially outward from its axis (measured from the midpoint of the shell) is 36.0 kN/C. (a) Find the net charge on the shell. nC (b) Find the electric field at a point 4.00 cm from the axis, measured radially outward from the midpoint of the shell. KN/C