B. Answer the following questions. 1. For the first graph. why are there vertical asymptotes at x = -2.0 m and at x = +2.0 m? Hint Use the point charge equation, E -4. and recall mathematically how you get a vertical asymptote. 2. For the first graph, why is the electric field always negative when x 2.0 m? 4. For the second graph, why is the electric field always positive when -2.0 m x