Continuous anchor wall whose ties are spaced at $5\mathrm{.}0$ m $,$ and placed $14$ m behind the bulkhead are used to restrain the top of a steel sheet pile bulkhead, is to resist a force of $209$ kN$/$m of bulkhead. The top of the anchor wall is $0\mathrm{.}7$ m below the ground surface $.$ Factors of safety of $1\mathrm{.}8$ for tie force and $2$ for passive resistance $($ONLY$)$ are considered. The anchor is embedded in the soil whose angle of internal friction is $36\backslash$deg $,$ cohesion of $1\mathrm{.}3$ kPa and unit weight of $17$ kN$/$m$^3.($i$)$ How high should the wall be$?,$ and $($ii$)$ is the anchor wall design adequate? HINT$1$: Work with net earth lateral pressure diagrams. HINT$2$: Use letter $\text{'}$b$\text{'}$ for the height of the wall.