The charges and coordinates of two charged particles held fixed in an xy plane are q1 = +3.0 μC, x1 = 3.5 cm, y1 = .50 cm, and q2 = -4.0μC, x2 = -2.0 cm, y2 = 1.5 cm. Find the magnitude and direction of the electrostatic force on particle 2 due to particle 1. At what x and y coordinates should a third particle of change q3 = +4.0 μC be palced such that the net electrostatic force on particle 2?