A particle of charge q1=+10.0 uC sits fixed at the coordinates (x=0, y=0.500 m). A second identical particle (q2=q1) sits fixed at the coordinates (x=0, y=-0.600 m). What is the electric field at point A, located at x=1.00m, y=0). A third particle of charge q3 = -4.00uC is placed at point A. What is the electric force acting on it?