Three point charges are located on a circular arc as shown in the figure below. (Let r = 3.84 cm. Assume that the +x-axis is to the right and the +y-axis is up along the page.) +3.00 nC -2.00 nC 30.0 P 30.0 +3.00 nC (a) What is the total electric field at P, the center of the arc? magnitude N/C direction to the right (b) Find the electric force that would be exerted on a -5.47 nC point charge placed at P. N magnitude direction to the left