The long bolt passes through the $30-$mm$-$thick plate as shown in $($Figure $1).$ The force in the bolt shank is $P=9\mathrm{.}0kN.$

Figure

Part A

Determine the average normal stress in the shank.

Express your answer to three significant figures and include the appropriate units.

${}_s=$

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Part B

Determine the the average shear stress along the cylindrical area of the plate defined by the section lines $a-a.$

Express your answer to three significant figures and include the appropriate units.

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Part C

Determine the average shear stress in the bolt head along the cylindrical area defined by the section lines $b-b.$

Express your answer to three significant figures and include the appropriate units.