You and your team are a group of electrical engineers working for Lightbulbs'R'Us. Given the problems that Lieutenant Pete “Maverick” Mitchell has been having with the warning lights, the Jet Propulsion Laboratory (JPL) Division of NASA has just called to place an large order for a new set of warning lights for their power delivery system. They have told you that a current of 2.5 A down the carrier wire should turn on the warning light. Unfortunately, due to JPL's time schedule, you do not have time to order LED bulbs and must construct the lightbulbs the old fashion way using a filament (very thin piece of wire, diameter = 0.1 mm) connected to the carrier wire (normal electrical wire, diameter = 1.63 mm). You happen to have the following metals in the warehouse, with known electron densities and electron mobilities. Which metals do you want to use for the carrier wire and for the filament? JPL would also be interested in knowing what kind of battery would be needed to power the lightbulbs and the electric field from the surface charges on your wires to make sure it doesn't interfere with their other equipment.