Two charges are placed on the x axis. one of the charges (q1 = +9.1 µc) is at x1 = +2.8 cm and the other (q2 = -22 µc) is at x2 = +8.4 cm. (a) find the net electric field (magnitude and direction) at x = 0 cm. (use the sign of your answer to indicate the direction along the x-axis.) n/c (b) find the net electric field (magnitude and direction) at x = +5.8 cm. (use the sign of your answer to indicate the direction along the x-axis.) n/c