A charge of -3.00 uC is fixed at the center of a clock. Two additional charges are fixed on the circle around the clock, which has a radius of 0.100 m. The charges on the circle around the clock are -4.00 uC positioned at 12 o'clock, and +5.00 uC positioned at 3 o'clock. What are (a) the magnitude and direction of each forces on the charge at the center of the clock, (b) the magnitude and direction of net force on the charge at the center of the clock (give the angle from 3 o'clock)