A truss structure shown below is pin supported at joint$$L and roller supported at joint I. The reactions of these supports due to the applied forces at joints C and G have been calculated and presented in the figure below.

Identify all zero$-$force members on the truss by writing down the members$$ label.

Using$$the Method of Sections $($M$.$O$.$S$.),$ calculate the member forces EF$,$ JF$,$ and JI

Using$$the Method of Joints $($M$.$O$.$J$.),$ calculate the member forces DK$,$ LB$,$ KB and BJ$.$ a$.$ Identify all zero$-$force members on the truss by writing down the members' label.

b$.$ Using the Method of Sections $($M$.$O$.$S$.),$ calculate the member forces EF$,$ JF$,$ and JI

c$.$ Using the Method of Joints $($M$.$O$.$J$.),$ calculate the member forces $\backslash ($ D K$,$ L B$,$ K B $\backslash )$ and $\backslash ($ B $\backslash$mathrm$\{$~J$\}\backslash ).$