can you solve me this

For $6$ points:

D$01004$: Refer to the image shown. Decimal Places: $2$

Use hand calculations, modeling is not necessary.

Torque" $($in$-$lb$)$

$4959$

"Shaft" diameter $($in$)=2$

"Key" width$/$height $($in$)=0\mathrm{.}3$

"Key" length $($in$)=2$

Assume uniform shear stress distribution across "Key" width.

What is the shear stress $($psi$)$ on the "Key" at the interface with the "Shaft"?