$1)(\backslash (35\backslash$mathbf$\{$p t s$\})\backslash )$ The truss system is given below. At $\backslash ($ A $\backslash ),$ there is a roller support, and at $\backslash ($ G $\backslash ),$ there is a pin support. The vertical distance between points $\backslash ($ G $\backslash )$ and $\backslash ($ H $\backslash )$ is $2\mathrm{.}5$ m $,$ between $\backslash ($ G $\backslash )$ and I is $3$ m $,$ and between G and J is $4$ meters.

a$)(5$ pts$)$ Determine all the support reactions at points A and G $.$

b$)(\backslash (30\backslash$mathbf$\{$p t s$\})\backslash )$ Determine the forces in members DI$,$ JI$,$ and GH$.$ State whether members are in tension or in compression. You can use both the method of joints and the method of sections.