$(40$ pts $)$ Determine shear flow distribution in the beam section due to a $1000$ lbf shear load in the

horizontal plane of symmetry $($the shear load acts through shear center$).$ Walls are constant ${0\mathrm{.}050}^{\text{'}\text{'}}$

thick.

Show equations, assumptions, units, etc., such that a competent engineer can easily follow the solution

logic. That includes clear sketches and readily legible writing. It also includes references for all

equations and data used.