A respiration monitor has a flexible loop of copper wire, which wraps about the chest. As the wearer breathes, the radius of the loop of wire increases and decreases. When a person in the Earth's magnetic field inhales, what is the average current in the loop, assuming that it has a resistance of 32.9 ? and increases in radius from 18.5 cm to 24.1 cm over 1.13 s? (Assume that the magnetic field is perpendicular to the plane of the loop and has a magnitude of 42.9 ?T.)