Problem l: $(50$ points$)$

Consider the truss structure shown below:

Evaluate the static indeterminacy of the structure. Show the calculation clearly stating the number of

unknown variables and the total number of available static equilibrium equations.

$(10$ points$)$

Given that $A$ is a pinned support and $B$ is a roller support and the load $P=8kN.$ Find the reactions at $A$

and $B.$

$(10$ points$)$

Using the method of joint, find forces in the members DE$,$ DC$,$ CE$,$ and CB$.$ State if these members are

in tension or compression.

$(30$ points$)$