A 56 cm diameter wheel accelerates uniformly about its center from 130 rpm to 400 rpm in 3.2 s.

(a) Determine its angular acceleration.
Express your answer using two significant figures.

(b) Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

(c) Determine the tangential component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.