The solid circular shaft is subjected to an internal torque of $\backslash ($ T$=4\mathrm{.}8\backslash$mathrm$\{$kN$\}\backslash$cdot $\backslash$mathrm$\{$m$\}\backslash ).$

$($Figure $1)$

Part A

Determine the shear stress developed at point $\backslash ($ A $\backslash ).$

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

$\backslash [$

$\backslash$tau$\_\{$A$\}=$

$\backslash ]$

Part B

Determine the shear stress developed at point $\backslash ($ B $\backslash ).$

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

Figure