You are driving a $2012$ Tesla Model S at $60$mph on a downhill road. The frontal area of the car is $18$ square ft$.$ The weight of the car is $1500$lb$.$ The air density is given as$0\mathrm{.}0017$ slugs$/$ft$3.$ When the car is at point A$,$ the elevation of the road was mentioned as $5000$ft$.$ After travelling sometime downward, the car reached to a point B with an elevation of $4980\mathrm{.}5$ft$.$The distance between point A to B is $650$ feet. Calculate the horsepower needed for the car to

overcome the resistances.