A charge of -3.0 UC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.050 m. The charges on the circle are +2.0 UC at the position due north and +4.0 UC at the position due east. What is the magnitude of the net electrostatic force acting on the charge at the center? 65 N 230 N 43 N 120 N 22 N 48 N