A scissors truss supports three forces at joints $B,C,$ and $D$ as shown in the figure below. The forces

have magnitudes $F_1=0$kip,$F_2=15$kip, and $F_3=45$kip. The truss is held in equilibrium by a pin

at point A and a roller at point $E.$ Note that sides ABC,CDE,AFD, and BFE are straight lines, and

member $CF$ is vertical. Joint $F$ lies $s=21ft$ to the right and $h=7ft$ above joint $A,$ and joint $C$ lies

$h=7ft$ above joint $F.$ Use the method of joints to determine the force in each member of the truss,

and indicate whether they are in tension or compression.

Note: Express tension forces as positive $(+)$ and compression forces as negative $(-).$