A point charge with charge q 1 = + 5 .00 nC is fixed at the origin. A second point charge with charge q 2 = − 7 .00 nC is located on the x axis at x = 5 .00 m . Where along the x axis will a third point charge of q = + 2 .00 nC charge need to be for the net electric force on it due to the two fixed charges to be equal to zero?