A flat (unbanked) curve on a highway has a radius of 220 m. A car successfully rounds the curve at a speed of 35 m>s but is on the verge of skidding out. (a) If the coefficient of static friction between the car’s tires and the road surface were reduced by a factor of 2, with what maximum speed could the car round the curve? (b) Suppose the coefficient of friction were increased by a factor of 2; what would be the maximum speed?