In a rectangular coordinate system a positive point charge of +10-: C is fixed at the points x = 0.1m, y = 0 and a negative point charge of -10-: C is at x = - 0.im, y = 0, Find the magnitude and the direction of the field at the following points : (a) the origin (b) x = 0.2m, y = 0 (c) x = 0.1m, y = 0.15m; (d) x = 0, y = 0.1m