please answer

Prob. #$1$:

The $T$ section shown in the figure is the cross section of a beam formed

by joining two rectangular pieces of wood together. The beam is

subjected to a maximum shearing force of $60$ kN $.$ Show that the N$.$A$.$ is

$34$ mm from the top and that $I_{NA}=10\mathrm{.}57{10}^{6}m{m}^4.$ Using these

values, determine the shearing stress a$.)$ at the neutral axis and b$.)$ at

the junction between the pieces of wood.