Suppose that $\backslash ($ P$\_\{1\}=1200\backslash$mathrm$\{$lb$\}\backslash )$ and $\backslash ($ P$\_\{2\}=1600\backslash$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.

$\backslash [$

F$\_\{$D C$\}=[$

$\backslash ]$

lb

Incorrect; Try Again; $3$ attempts remaining

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.

Incorrect; Try Again; $7$ attempts remaining

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.

$\backslash [$

F$\_\{$J I$\}=$

$\backslash ]$

Incorrect; Try Again; $7$ attempts remaining