$5\mathrm{.}2.$ Fig. $(2)$ shows a mechanism in which the

crank AB turns uniformly, the blocks at

$D$ and $E$ are working in frictionless

guides. Draw the velocity vector figure

and state the velocity of block $D$ and

angular velocity of crank $AB$ if the

velocity of block $E$ is $86c\frac{m}{sec}.$ Find the

turning moment at $A$ if a force of $1KN$

acts on $D$ in the direction of the arrow $x$

and a force of $1\mathrm{.}5KN$ acts on $E$ in the

direction of arrow Y$.$