A charge +q is located at 6.000 cm, a second charge -2q is located at 16.00 cm, and a third charge +q is located at 22.00 cm. the magnitude of q is 2.650uC. use K= 8.988 *10^9 N*m^2/C^2 for the coulomb constant. What is the force Fx on the charge located at x=16.00 cm?