The gravity wall shown has been designed to resist over$-$turning and sliding. The total vertical force component, W$,$ made up of the self$-$weight of the wall is $200$ kN per unit length of wall. If the height of the wall. H$.$ is $3\mathrm{.}6$ m and the width. B$,$ is $2\mathrm{.}5$ m$,$ determine the factor of safety against sliding

$=,17k\frac{N}{m}3$

$c_A=,10k\frac{N}{m}2$

$=27$

$=20$

$W=200k\frac{N}{m}$

The factor of safety against sliding is $($use $2$ decimal places$)$