$6\mathrm{.}15.$ Find the shear flows in the webs of the box beam shown by two methods. The area is symmetrical about a horizontal center line.

Prose. $6\mathrm{.}16$ and $6\mathrm{.}17.$

$6\mathrm{.}16.$ Find the shear flows in the webs of the beam shown by two methods, All stringers have areas of $1\mathrm{.}0$ sq in $.$

$6\mathrm{.}17.$ Assume that the two right$-$hand stringers have areas of $3\mathrm{.}0$ sq in $.$ and the other stringers have areas of $\backslash (1\mathrm{.}0\backslash$mathrm$\{$sq$\}\backslash$mathrm$\{$in$\}\backslash ).$ two methods.