A cross section of the original design for the double$-$decker skyways in

the Kansas City Hyatt Regency hotel is shown, along with the forces acting

on the nuts and washers that support the upper and lower walkways

$($Figure P$4\mathrm{.}24,$ see on page $160).$

$($a$)$ Draw free body diagrams of the upper and lower walkways, including the

weight w that acts on each.