An electric point charge of q1 = 7.85 nc is placed at the origin of the real axis. another point charge of q2 = 3.67 nc is placed at a position of p = 2.88 m on the real axis. at which position can a third point charge of q = -3.47 nc be placed so that the net electrostatic force on it is zero? let the sign of q2 be changed from positive to negative. at which position can the point charge q be placed now so that the net electrostatic force on it is zero?