I really need help on this question. I need it to be solved correctly because I have one more try.

The mass of a roller coaster car, including the riders, is 514 kg. The path of a portion of the ride is shown in the diagram below. The radii of curvature at the three points A, B, and C are 18.4 m, 10.2 m, and 5.60 m, respectively. The car, which travels from right to left, has a speed of 12.8 m/s and 22.5 m/s at A and B, respectively. (a) What is the force exerted by the track at these two locations? (Enter the magnitudes of the forces.) At A 5.000 X Did you draw a free-body diagram and label all forces acting on a vehicle? What is the direction of the normal force (due to the track) on the car when it is at A? What is the net force acting on the car? N At B 26,000 X What is the net force acting on the car when it is at B? N (b) At what minimum speed will the car lose contact with the track at C? 7.4 m/s Additional Materials Reading Tutorial