Problem $13\mathrm{.}4$ Part b

The following unit weights are provided to you:

For the silty sand:

Dry unit weight, gamma$\_$d $=15\mathrm{.}34k\frac{N}{m^3}$

Saturated unit weight, gamma$\_$sat $=19\mathrm{.}45k\frac{N}{m^3}$

For the silty clay:

Saturated unit weight, gamma$\_$sat $=20\mathrm{.}36k\frac{N}{m^3}$

Using the unit weights above, calculate the effective vertical stress at point

A$,$ sigma$\_$A$\text{'}=$

$k\frac{N}{m^2}$

$($Express your answer with one decimal place$)$

tau$\_$fA $=$

$k\frac{N}{m^2}$

$($Express your answer with one decimal place$)$