$15\mathrm{.}105$ A $900-mm$ rod rests on a horizontal table. A force $P$ applied as

shown produces the following accelerations: $a_A=3\mathrm{.}6\frac{m}{s^2}$ to the

right, $=6ra\frac{d}{s^2}$ counterclockwise as viewed from above. Deter$-$

mine the acceleration $($a$)$ of point $G,(b)$ of point $B.$