A vehicle performance is being tested on a large flat are. At this situation:

a$)$ What coefficient of side friction must be developed at a speed of $90$ km$/$hr and a Degree

of curvature $=8$ degrees?

b$)$ What is the sharpest curve $($stated in degrees$)$ that the vehicle traveling at $80$ km$/$hr can travel

if the coefficient of side friction is $0\mathrm{.}15?$

c$)$ Find the number of lanes and draw a neat cross section for the suggested road showing the

utilities location