Crank AB rotates with a constant angular velocity shown in the figure below. Determine the magnitude of the acceleration of point B $,$ and the angular velocity of link $BC,$ at the instant shown.

Select one:

A$.a_B=0\frac{m}{s}$ and ${}_{BC}=5\mathrm{.}2ra\frac{d}{s}($counter clockwise$)$

B$.a_B=0\frac{m}{s}$ and ${}_{BC}=6\mathrm{.}23ra\frac{d}{s}($counter clockwise$)$

C$.a_B=1\mathrm{.}8\frac{m}{s}$ and ${}_{BC}=5\mathrm{.}2ra\frac{d}{s}($clockwise$)$

D$.a_B=10\mathrm{.}8\frac{m}{s}$ and ${}_{BC}=6\mathrm{.}23ra\frac{d}{s}($clockwise$)$