4. A circular conducting wire of radius a and resistance R is located on the ry plane (z = 0). The ring is embedded in a time-dependent homogeneous magnetic field given by: B(t) = Bo sin(wt) i + Bosin(wt) j + 2 Bo sin(wt) k a) Calculate the magnetic flux through the ring. (1 point) b) Calculate the induced current in the ring. (1 point)