The beam shown is supported by a roller at $"$ A $"$ and a pin at $"$ C $".$ If $w1=8\mathrm{.}5l\frac{b}{f}t,w2=12\mathrm{.}4l\frac{b}{f}t,$ and $w=6\mathrm{.}4l\frac{b}{f}t$ :

$1$:What is the vertical reaction at C $($Cy$)$ in lbs$?$