1. Shown to the right are three charges. Their charges and distances to the top-right corner of the square (marked with an x) are given. The drawing is not to scale. a. Use principles from chapter 25 to calculate the electric potential at the point marked with an X. b. These charged may look familiar - you saw them in the homework for chapter 23.In that homework, you found that the electric field is zero at the X. Explain why the electric field can be zero at the X while the electric potential is not.