In the shown mechanism and at the given instant, if the link OB is rotating with a constant clockwise angular velocity of ${}_{OB}.($i$)$ Determine the angular velocity of the link BA$.($ii$)$ Determine the acceleration of the sliding block A$.$

Note that :${}_{OB}=4ra\frac{d}{s},=46,=31,=42,l_{OB}=0\mathrm{.}76m$ and $l_{BA}=1\mathrm{.}22m$

Answer: