Two charges q1 = 6 C, q2 = -23 C, are L = 17 cm apart. A third charge is to be placed on the

Two charges q1 = 6 µC, q2 = -23 µC, are L = 17 cm apart. A third charge is to be placed on the line between the two charges. How far from q1 should the third charge be placed so that the net electric force on the third charge is minimized?