Based on the $40 \mathrm{MPa}$ allowable normal stress, a maximum load of $\mathrm{P}=57.888 \mathrm{kN}$ could be supported by the bar.

Based on the $25 \mathrm{MPa}$ allowable shear stress, the maximum load is $\mathrm{P}=26.286 \mathrm{kN}$.

The smaller of these two values controls; therefore, the maximum load that can be applied to the bar while satisfying both the normal stress and shear stress limits is $\mathrm{P}=26.286 \mathrm{kN}$.

Finished