Two point charges are placed on the x axis as follows: Charge q1 = x = 0.225 m and charge q2 =-5.65 nC is at x = +0.400 m. +4.25 nC is located at %3D What is the magnitude of the net force exerted by these two charges on a third point charge q3=-0.590nC placed at the origin? Express your answer in newtons.