For a slab$-$on$-$grade design, the effective PI for the site is $45.$ Please determine the cantilever length Ic$,$ if the site is located at

Houston and slab is $112120ft2?$

$7ft$

$6\mathrm{.}1ft$

$7\mathrm{.}8ft$

$8\mathrm{.}1ft$