Q$1-$ A gravity retaining wall is shown in Fig. Q$1,$ calculate the factor of safety against overturning, sliding and bearing capacity. y$1=16\mathrm{.}5$ kN$/$m$^3,1=35\backslash$deg $,2=16\mathrm{.}8$ kN$/$m$^3,2-25\backslash$deg $,2=28$ kN$/$m$^2$