Using Coulomb's method, determine the total parsshe force $($in kN per m length and acciarate ta $3$ significant figures$)$ for the frictionless gravity retaining wall chown. Assame $H=4\mathrm{.}75m,0-9,-3^2$ and the unit weight, cohesive strength and internal angle of frictlon for the sand CLAY $=17\mathrm{.}2k\frac{N}{m^3},25$kPa and $18.$ Do not include the effect of slorinkage cratks in your answer