Describe the three approaches presented by Coduto for assessing what bearing capacity to use

when the soils beneath your site are layered within a depth of $1\mathrm{.}5B$ beneath the intended base of the

spread footing foundations. For an example to assess, assume that the footings are to be $8ft.$ wide

$($they vary$)$ and are square. The bearing soil will be dense medium to fine sand, but it is only

$5ft.$ thick, and it overlies a medium clay with $c=700psf.$ No bearing capacity calculations are

needed, just explain the three different approaches to assessing the allowable bearing capacity.

But, also state the soil shear strength that would be used in each of these three approaches.