For a retaining wall shown in Figure $2,$ the wall dimensions are H$=10$m$,$ x$1=0\mathrm{.}35$m$,$ x$2=0\mathrm{.}75$m$,$

x$3=1\mathrm{.}5$m$,$ x$4=4$ m$,$ x$5=1\mathrm{.}2$ m $,$ D$=2\mathrm{.}0$ m$,$ and $=15$o; and the soil properties are $1=16\mathrm{.}8$ kN$/$m$3,1=34$o$,$

$2=17\mathrm{.}6$ kN$/$m$3,2=30$ o$,$ and c$2=10$ kN$/$m$2.$ Calculate the factors of safety with respect overturning

and sliding using Rankine$$s earth pressure theory. The unit weight of the concrete is $23\mathrm{.}5$ kN$/$m$3.$ It

is assumed the correction factors k$1=$ k$2=2/3.$

Comment on the factor of safety values that you determined for this retaining wall. If the values of FS

that you have determined do not meet the design criteria, what measures you suggest for improving

them.