1. Two + 1-unit point charges are placed at the locations (x.y) = (0.1) and (0,-1). a. Is the electric potential at the origin (x = 0. y = 0) greater than. less than, or equal to the potential at the location (x = -1. y = 0)? Explain. b. Where on the -x-axis could a -6-unit point charge be placed such that the potential would be zero at the location x=1, y=0? Add the -6-unit charge to the diagram. Use the online simulator Charges and Fields to check your results (search on "PhET Charges and Fields"). Resolve any V=0 inconsistencies between your prediction and the simulator here results. Once you are ready, explain your reasoning below. Will the electric field also be zero at the location that you found? Explain. 2. Review Activity II of the lab. Suppose that a negatively charged rod were used instead of the positive rod. If a particle with charge +q. were moved from W to Z in this new situation: would the electric field do positive, negative, or zero work? Explain. would the potential energy of the system consisting of the rod and the particle increase, decrease, or remain the same? Explain. In this new situation, would the electric potential be higher at point W or at point Z? Explain. In this scenario, should the charged rod be considered a probe object or a source object? What about the particle