A positive charge +q1 is located to the left of a negative charge -q2. On aline passint through the two charges, theer are two places where the total potential is zero. The first place is between the charges and is 4cm to the left of the negative charge. The second place is 7cm to the right of the negative charge. What is the distance between the two charges? Find the q1/q2 ratio of teh magnitudes of the charge.