Q$\mathrm{.}1)(50$ marks$)$ For the following cantilever retaining wall, design stem $($wall$)$ for bending and shear. $f_c^{\text{'}}=28$MPa and $f_y=400$MPa, concrete clear cover $=5cm.$ Neglect footing design. Show the detailing of your design on the figure. Active earth pressure coefficient $K_a=0\mathrm{.}333,$ neglect passive earth pressure. Soil density $=18k\frac{N}{m^3}.$ Check for sliding, overturning, and soil stress.