Suppose that $P=340lb.($Figure $1)$

Part A

Determine the force in the member $EF$ 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.

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Part B

Determine the force in the member $CF$ 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.

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${?}^{F}CF=$

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Part C

Determine the force in the member $BC$ 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.

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$F_{BC}=$

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