(a) Two point charges are a distance d apart along the y-axis. Find the electrie field (magnitude and direction) at any point in the y=0 plane when the charges are: i) 9 = 9, 92 = 0 ii) both equal 9 = 2 =9 iii) of opposite polarity but equal magnitude q, = -92 = q. This configuration is called an electric dipole with dipole moment p, = qd. (b) For each of the 3 cases in (a) find the force on q,. 92