3. Charges of 49.7 x 107 C each are located at three of the corners of a square that is 1.0 m on each side. A charge of -1.5 x 10" C is located at the bottom left corner. What is the electric field at the center of the d - Im square (magnitude and direction)? What is the electric potential at the center of the square? 4. An electron is released from rest at point B (as shown to the right), where the potential is O V. Afterward, the electron (choose one of the following and defend your -100 V QV +100 V choice): a) Remains at rest at B. b) Moves toward C with a steady speed. c) Moves toward C with an increasing speed. d) Moves toward A with a steady speed. e) Moves toward A with an increasing speed. 5. The diagram shows three spatial points (A, B, and C) E field in a uniform electric field that points from left to right in the plane of this page. Each point has an associated A. C. electric potential (VA, VB, Vc). Rank the potentials for these three points, from least to greatest. Add a point D B. to this diagram such that it is at a lower potential than points A or B but at a higher potential than point C