$3.)$ Consider the $2$D simple$-$truss shown below where point $A$ is connected via a pin, and point $E$ has a roller. P$1=10\mathrm{.}0kN,P2=13\mathrm{.}0kN,P3=8\mathrm{.}0kN.$

a$)$ Identify and label all reaction forces $($on the diagram$)$

b$)$ Solve for the values of all reaction forces

$(3$ pts$)$

c$)$ Solve the force in each of the members using the method of joints

$(5$ pts$)$

$(12$ pts$)$

$20$ POINTS