A thin negatively-charged wire of length 100 mm and net charge Q=- 0.1 C is placed horizontally along the x-axis with one end at the point of origin. a) Compute the charge density. b) Compute the electric field at point (100mm, 0), (50mm, 0), (10mm, 0) and (1mm,0) c) Compute the potential at point (1mm, 0) d) Compute the potential difference between point (0,0) and (1mm,0)