For the truss shown below:

a$)$ List all the zero$-$force members.

b$)$ Calculate the magnitude of the forces in members HJ$,$ GI$,$ and JK and state if they are in tension or compression. Draw the appropriate free$-$body diagram$($s$).$

The answers for part B is $8\mathrm{.}25$ kN$,16$ kN$,$ and $26\mathrm{.}8$ kN respectivley but I didn't get those so I need some help. $($It$\text{'}$s exam review$)$