$[2]$ The lumped beam I$-$section shown in Fig: Q$2$ is subjected

to a pure moment of $1000$ in$-$kips.

Axial loads are carried in the upper cap, $\text{'}b\text{'}$ and lower cap,

$\text{'}a\text{'}$ and shear loads are carried in the webs. Find the axial

stresses and axial forces in the upper and lower caps.

Fig: Q$2$