For the plane tinsis shown below. The reactions $4$ e $F_y=27\mathrm{.}5kN+F_1=25kN,$ an

d $E_y=7\mathrm{.}5k$n$.$

$($a$)$ identifyy all zero force members.

$($b$)$ Find all the internal axial forces. Properly label all the forces on the truss, as shown during class, and

indicate if they are in tension of compression.