$($Answer BOTH Parts of This Problem$)$ For each structure shown, compute the reactions and draw shear and bending moment diagrams. Indicate which are positive and which are negative segments of each bending moment diagram. For each shear and bending moment diagram, calculate and indicate the magnitudes of the maximum positive and maximum negative ordinates. $($A$)(16)$

$($Answer BOTH Parts of This Problem$)$

For the trusses shown below, calculate the forces in the members that

are listed. For each force, indicate whether it is tension or compression.

a$)$ Calculate the forces in:

$U_2-U_3,L1-L2$ and $U_1-L_3$

Diagonals are not connected where they

cross.

b$)$ Calculate the forces in:

$U_2-U_3,L1-L_2$ and $U_3-L_3$