Question $1$:

A $1\mathrm{.}2km$ long rural freeway segment has a $5$ percent upgrade. The expected traffic composition is $10$ percent trucks and buses. The adjustment factor for driver population is expected to be $0\mathrm{.}77.$ Interchanges are about $8km$ apart. If the hourly volume is expected to be $1,950vph$ with a peak hour factor of $0\mathrm{.}85,$ how many lanes are needed to provide LOS C$?$