b$)$ A rural road is being designed for a speed of $70k\frac{m}{h}r.,$ on a horizontal curve with a super elevation of $5\%.$ If the coefficient of friction is $0\mathrm{.}10.$

$($i$)$ What is the minimum radius of the curve in meters required for safe vehicular movement? Is the radius adequate?

$(4$marks$)$

$\backslash$table$[[\backslash$table$[[$Design Speed$],[V_0(k\frac{m}{h})$