A stiff clay underlies a $12$ thick thick silty sand deposit. A sheet pile is driven into the sand to a depth of $7m,$ and upstream and downstream water levels are as shown in the figure below.$(($:$k=8\mathrm{.}6{10}^{-6},Gs=2\mathrm{.}65,e=0\mathrm{.}72\}$

Find following values:

The seepage beneath the sheet pile in $\frac{m^3}{?}$ day$/$m

$i_{\text{e}\text{x}\text{i}\text{t}}$

$i_{\text{c}\text{r}\text{i}\text{t}}$

safety factor against piping

if we want to consider a minimum factor of safty $5,$ is the arrangement safe against piping?