(a) Determine the electric field strength at a point 1.00 cm to the left of the middle charge shown in the figure below. (Enter the magnitude of the electric field only.) 6.00 . 1.50 C -2.00 C + N/C 3.00 cm + Select- 2.00 cm- (b) If a charge of -2.89 C is placed at this point, what are the magnitude and direction of the force on it? magnitude direction