The charges and coordinates of two charged particles held fixed in an xy plane are q1 = 2.98 JC, x1 = 4.39 cm, y1 = 0.676 cm and q2 = -4.20 JC, x2 = -1.54 cm, y2 = 2.17 cm. Find the (a) magnitude and (b) direction (with respect to +x-axis in the range (-180%;180"]) of the electrostatic force on particle 2 due to particle 1. At what (c) x and (d) y coordinates should a third particle of charge q3 = 6.48 pC be placed such that the net electrostatic force on particle 2 due to particles 1 and 3 is zero