QUESTION $1$

$[55]$

The following information was obtained after geotechnical investigations were conducted on a proposed site for a storage tank.

The soil layers have the following properties:

Table $1$

$\backslash$table$[[$Thickness$,$Soil type,Soil properties$],[0-2\mathrm{.}7m,$Sand,${}_{\text{d}\text{r}\text{y}}=16\mathrm{.}1k\frac{N}{m^3}$;${}_{\text{s}\text{a}\text{t}}=17\mathrm{.}8k\frac{N}{m^3}$;$E_s=15,005k\frac{N}{m^2}$