P$\_(1)=600$lb and P$\_(2)=800$lb$.$ Suggestion: Use the sections shown in $($Figure $1).$

Figure Fundamental Problem $6\mathrm{.}12$

Suppose that $\backslash ($ P$\_\{1\}=600\backslash$mathrm$\{$lb$\}\backslash )$ and $\backslash ($ P$\_\{2\}=800\backslash$mathrm$\{$lb$\}\backslash ).$ Suggestion: Use the sections shown in $($Figure $1).$

Part A

Determine the force in the member $\backslash ($ D C $\backslash )$ of the truss.

Express your answer in pounds to three significant figures. Enter negative value in the case of compression and positive value in the case of tension.

Part B

Determine the force in the member $\backslash ($ H I $\backslash )$ of the truss.

Express your answer in pounds to three significant figures. Enter negative value in the case of compression and positive value in the case of tension.

$\backslash [$

F$\_\{$H I$\}$

$\backslash ]$

Part C

Determine the force in the member $\backslash ($ J I $\backslash )$ of the truss.

Express your answer in pounds to three significant figures. Enter negative value in the case of compression and positive value in the case of tension.