For a crank$-$slider system. The position difference of slider is $R_{co}=10$i inch, where o represents origin and C represents the slider $($one end is fixed in origin$).$ The length for the other two bars is $3$ inch and $9$ inch, respectively.

$(1)$ Define the other vectors and write the loop$-$closure equation. You must label the three vectors and flefine each vector's direction.

$(2)$ Determine the postures of links $1$ and $3.$ Please note that you must solve it with graphical solutions. Otherwise, you will get no credit. Also, please solve it with graphical solution and freehand drawing will NOT BE ACCEPTED.