In 1955, a water bore that was 2231 m deep was drilled in Montana. Consider two charges, q2 = 1.60 mC and q1, separated by a distance equal to the depth of the well. If a third charge, q3 = 1.998 µC, is placed 888 m from q2 and is between q2 and q1, this third charge will be in equilibrium. What is the value of q1