Two point charges are placed on the x axis. (Figure 1) The first charge, 1 = 8.00 nC , is placed a distance 16.0 m from the origin along the positive x axis; the second charge, $2 = 6.00 nC, is placed a distance 9.00 m from the origin along the negative x axis. Part B An unknown additional charge q3 is now placed at point B, located at coordinates (0 m, 15.0 m ). Find the magnitude and sign of q3 needed to make the total electric field at point A equal to zero. Express your answer In nanocoulombs to three significant figures. > View Available Hint(s) 93 = Submit Provide Feedback Figure 8 (0 m, 15 m) A (0.mu, 12 0)