$1-(20pts)$ Consider the mechanism shown below. Determine the

rotational velocity of link $2($magnitude and direction$)$ for the instant

shown in the figure. The linear velocity of the slider $4$ is vA $=2\mathrm{.}0$

$i\frac{n}{sec}$ in the direction shown. Use analytical method $($complex

vector equation$).$

Draw the vector loop and indicate the direction of all vectors on the

diagram.