Extended Response. 5 Marks 1. a) My brother has a transformer with an output voltage of a 75-W transformer and 12V, and the input current is 22A. (i) Is this a step-up or a step-down transformer? (ii) By what factor is the voltage multiplied? b) 65MW of power at 45kV arrives at my brother's town from a generator via 3.0 0 transmission lines, determine (i) the power that is wasted in the lines. (ii) the voltage at the generator end of the lines