The disk has the angular velocity and angular acceleration shown $($both CCW $).$ If the disk rolls without slipping, find:

a$.$ The velocity $($vector$)$ of point $C.$

b$.$ The acceleration $($vector$)$ of point $B.$

$=3ra\frac{d}{s}$

$=8ra\frac{d}{s^2}$

The answer is a$)2\mathrm{.}77$ b$)7\mathrm{.}42$