The earth orbits the sun once a year (3.16 107s) in a nearly circular orbit of

Question:

The earth orbits the sun once a year (3.16 × 107s) in a nearly circular orbit of radius 1.50 × 1011 m. With respect to the sun, determine
(a) The angular speed of the earth,
(b) The tangential speed of the earth, and
(c) The magnitude and direction of the earth’s centripetal acceleration.