At a location on a beam the shear force is $V=1800lb.$ The cross$-$section of the beam is a rectangular tube with outside dimensions $8$ in X $10$ in and constant thickness equal to $1$ inch. The maximum shear stress developed at that location is most closely equal to:

$$

$114$ psi

$185$ psi

$28\mathrm{.}5$ psi

$75$ psi

$47$ psi