What is the velocity of the roller coaster in m/s?What is the average force required in N?

A 980-kg roller coaster car drops from rest at a height of 95 m along a frictionless track. What is the velocity of the roller coaster at the top of a second hill that is 58 m high? What average force is required to bring the car to a stop along a 160 m stretch of horizontal track at ground level at the end of the ride? The velocity of the roller coaster is m/s. The average force required is