In the figure an electric field is directed out of the page within a circular region of radius R = 4.00 cm. The magnitude of the electric field is given by E = (0.500 V/m⋅s)(1 − r/R)t, where radial distance r ≤ R and t is in seconds. What is the magnitude of the magnetic field that is induced at radial distances (a)3.00 cm and (b) 7.00 cm ? (a) Number Units (b) Number Units