$3-4.$ A square footing is shown below. $($i$)$ Determine the allowable bearing pressure, using a factor of safety of $3.($ii$)$ Determine the maximum allowable load on the square footing $($in kips$).$

Soil parameters are below:

$=100l\frac{b}{f}{t}^3$

${}_{\text{s}\text{a}\text{t}}=115l\frac{b}{f}{t}^3$

$c=0$

$=30$

$B=4ft$

$D_f=3\mathrm{.}5ft$

$h=2ft$