Compute all parts of given problem:
Problem: A circular loop in the plane of a paper lies in a 0.55T magnetic field pointing into the paper. The loop's diameter changes from 23.0cm to 6.2cm in 0.47s.
Part A: What is the magnitude of the average induced emf?
Part B: What is the average induced current if the coil resistance is 3.1ohm?
Please show all work and steps to find the magnitude of the average induced emf.