Physics- centripetal accelertion?

The earth rotates once per day about an axis ping through the north and south poles, an axis that is perpendicular to the plane of the equator. uming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated at each of the following. determine this for the equator and (b) the latitude of 54 degrees north the equator.