Two charges +4.0 C and +18 C are placed along the x axis, with the first charge at the origin (x 00) and the second charge at x = +1.00 m. Find the magnitude and direction of the net force on a -7.0 nC charge when placed at = the following locations below. Overall Hint a. halfway between the two charges: magnitude of force is 3.52 mN, and the direction is (in +x direction b. on the x axis at x = -0.50 m: magnitude of force is 1.5 and the direction is (in +x direction OB mN, c. at the coordinate (x, y) = (1.00 m, 0.50 m) (half a meter above the +18 C charge in a direction perpendicular to the line joining the two fixed charges): Hint for (c) Magnitude of force is 46.2 x mN, and the direction is 87.77 X degrees below -x axis.