$($Prob $3-1$ & $3-3)$ Classify each of the following trusses as statically determinate, statically indeterminate, or unstable. If indeterminate state its degree. $(10\%)$

$($b$)$

$($f$)$

Figure $6$

$($Prob$.3-23)$ Determine the force in members EF$,$ EP$,$ and LK of the Baltimore bridge truss and state if the members are in tension or compression. Use the method of sections. Also, indicate all zero$-$force members. $(20\%)$