Three charged particles (7.00 µC ,-4.00 µC, and q = 2.00 µC) are at the corner of an equilateral triangle of L = 0.500 m as shown in the figure below. a) Calculate the electric field at the position of the 2.00 µC charge due to the 7.00 µC and - 4.00µC charges. b) Use your answer in part a) to calculate the force on the 2.00 µC particle.