answer key: -6.40*10^13i N/C Can somebody show me the steps to the answer key?

Question

The figure below shows a dipole. If the positive particle has a charge of 37.1 mC and the particles are 2.66 mm apart, what is the electric field at point A located 2.00 mm above the dipole's midpoint? (Express your answer in vector form.)
The figure is a xy plane with A on the positive y axis. The negative charge is on the left of the x axis and positive charge is on the right of the y axis.