A circular loop in the plane of the paper lies in a 0.34T magnetic field pointing into the paper. If the loop’s diameter changes from 20.0cm to 6.6cm…

A circular loop in the plane of the paper lies in a 0.34T magnetic field pointing into the paper. If the loop’s diameter changes from 20.0cm to 6.6cm in 0.40s. What is the magnitude of the average induced emf?