Design a cantilever retaining wall $($length $=200ft)$ to support a bank of earth $24ft.$ high above the final level of earth at the toe of the wall. The retained material is level and has a weight of $100pcf$ with active and passive pressure coefficients of $0\mathrm{.}28$ and $3\mathrm{.}6,$ respectively. The coefficient of friction is $0\mathrm{.}45$ between concrete and soil. The maximum soil pressure under service load shall not exceed $3500$ psf$.$ Assume this wall is located in Cleveland, $OH.$ Use $f_c^{\text{'}}=3000,f_y=60,000,$ and the straight method of the ACI code.