Problem $3$

The lattice shown in Figure $3$ is supported at point $A$ by a roller and at point $E$ by a pin:

$1-$ The size and direction of the reactions in $E$ and $A.$

$2-$ The internal forces in bars EF$,$ AD and ED using the section method. Indicate whether the members are in tension or compression.

$3-$ The internal forces in the FG and GC bars using the knot method. Indicate whether the members are in tension or compression.