The bolts are $\frac{1}{2}-$in$.-$diameter bolts. Take $P_1=5$ kips and $P_2=2\mathrm{.}5$ kips.

The maximum average shear stress developed in each bolt is most nearly:

$7\mathrm{.}6$ ksi

$6\mathrm{.}4$ ksi

$2\mathrm{.}3$ ksi

$5\mathrm{.}1$ ksi

$3\mathrm{.}4$ ksi