(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 uC 1.50 uC -2.00 uC 3.00 cm -- 2.00 cm -- N/C (b) If a charge of -2.64 JC is placed at this point, what are the magnitude and direction of the force on it? magnitude direction -Select