Two charges –2.0µC and 2.0µC are separated by 4.0 cm on the z-axis symmetrically about origin, with the positive one uppermost. two space points of interest p₁ and p₂ are located 3.0 cm and 30 cm from origin at an angle 30° with respect to the z-axis. evaluate electric potentials at p₁ and p ₂in two ways: (a) using the exact formula for point charges, and (b) using the approximate dipole potential formula.