Problem $5$:

Consider the truss shown in the figure, with

$d_x=100mm,d_y=40mm$

$l_2=90mm$

and the inclination of link $3$ is ${}_3=20.$

a$)$ Construct the loop$-$closure equation for this truss;

b$)$ Determine the inclination of link $2{}_2$ and the length of link $3.$

if you could please show all work done that would really help