Point charges q1 = -4.5 nC and q2 = +4.5 nC are separated by 3.1 mm, forming

Question:

Point charges q1 = -4.5 nC and q2 = +4.5 nC are separated by 3.1 mm, forming an electric dipole.
(a) Find the electric dipole moment (magnitude and direction).
(b) The charges are in a uniform electric field whose direction makes an angle of 36.9° with the line connecting the charges. What is the magnitude of this field if the torque exerted on the dipole has magnitude 7.2 X 10-9 N·m?