Point charges q1 = − 4.20 nC and q2 = 4.20 nC are separated by a distance of 3.60 mm, forming an electric dipole.

a) Calculate the electric dipole moment for the given charges.
b) Describe the nature of the electric field produced by the dipole.
c) Determine the direction of the electric field at various points around the dipole.
d) How would the electric dipole moment change if the magnitudes of the charges were doubled?