Coil a of radius 4.59 m lies in the xy-plane, with its center at the origin. coil b of radius 7.5 cm is perpendicular to the z-axis with its center on the z-axis. coil a has a current of 5.94 a and is fixed in place. coil b is moving towards coil a along the +z-axis at 6.6 m/s. estimate the e induced in coil b at the moment it passes through the origin. take counterclockwise as viewed from the +z-axis as positive. answer in units of v.