Situation $2-$ A beam is supported by the angle bracket as shown. The bracket is bolted to the column flanges using with two $20mm-$diameter bolts. The reaction from the beam is $75kN$ and is assumed to be concentrically applied at the connection. The bracket is $75mm75mm12mm$ with length $L=160mm.$ The column flange thickness is $15mm$ and the beam flange thickness is $10mm.$

$8.$ How much is the critical bolt bearing stress $($ MPa $?$

A$.125\mathrm{.}7$

C$.156\mathrm{.}3$

B$.312\mathrm{.}5$

D$.236\mathrm{.}8$

$9.$ Determine the critical bolt shearing stress $($MPa$).$

A$.238\mathrm{.}7$

C$.119\mathrm{.}4$

B$.156\mathrm{.}7$

D$.325\mathrm{.}4$

$10.$ Compute the bearing pressure $(MPa)$ in the bracket.

A$.9\mathrm{.}54$

C$.6\mathrm{.}25$

B$.6\mathrm{.}51$

D$.13\mathrm{.}33$