Problem $15\mathrm{.}176$ modifled

It is known that at the instant shown the rod attached at A has an angular velocity of $5\mathrm{.}0ra\frac{d}{s}$ counterclockwise and an angular acceleration of $20ra\frac{d}{s^2}$ clockwise.

Determine the angular velocity and the angular acceleration of the rod attached at $B.$

$($:$=,ra\frac{d}{s^2}$