ZOOM 3.Two thin rods of length L lie along the x-axis. Rod 1 lies between x = a / 2 and x = a /2+ L, and rod 2 lies between x =-a / 2and x =-a /2-L. Each rod has a positive charge Q distributed uniformly along its length. (a) Calculate electric field produced by the second rod at points along the positive x - axis . (b) Calculate the magnitude of the force that one rod exerts on the other. (5-points)