All vectors (magnitude and direction) of the Ekman spiral yield a net current direction that is ______ degree to the ______ of the prevailing wind in the Northern Hemisphere. This composite current is the ______ and it controls the motion of the surface ocean.a. 90, right, Ekman transportb. 60, left, Geostrophic componentc. 30, right, Coriolis effectd. 0, left, upwelling