A Girl and Her Bicycle Have a Total Mass of 40

A girl and her bicycle have a total mass of 40 kg.At the top of the hill her speed is 5.0 m/s.The hill is 10 m high and 100 m long.If the force of friction as she rides down the hill is 24 N,what is her speed at the bottom?

A) 5.0 m/s
B) 10 m/s
C) 11 m/s
D) She stops before she reaches the bottom.