Answer Happy

Please I mainly need 6 and 7. Don't copy and paste the answers from another tutor.
Use this information for questions 5-7. A 750 kg (combined mass) Roller coaster car is pulled up the first hill of the ride by a tow chain starting from rest at the bottom of the hill. The force of the chain 4,600 N along a distance of 40.0 m, raising the car by 25.0 m. The friction acting on the car is negligible. A y = 25.0 m B y = 10.0 m D C y = 0.0 m y = 3.0 m 5. The tow chain exerts a force of 4,600 N for a distance of 40.0 m. Calculate the work done on the roller coaster car by the tow chain. 6. Calculate the change in potential energy from (A) to point (B). 7. How fast is the car travelling at point (D)?