Two long, parallel transmission lines, 42.0 cm apart, carry 22.0-a and 75.0-a currents. part a) find all locations where the net magnetic field of the two wires is zero if these currents are in the same direction. assume that the positive x axis is directed from the 75.0-a wire to the 22.0-a wire perpendicular to the wires, with the origin on the 75.0-a wire. part b) find all locations where the net magnetic field of the two wires is zero if these currents are in the opposite direction. assume that the positive x axis is directed from the 75.0-a wire to the 22.0-a wire perpendicular to the wires, with the origin on the 75.0-a wire.