Hello, can anyone please help me with this question thanks in advance

A 1800 kg vehicle is traveling at 125 km/hr when the driver notices a stop sign approaching. The driver lets off on the gas, shifts to neutral, and begins coasting. The drag force from tires, wheel bearings, and aerodynamics amounts to a constant value of 520 N. Because the road has a dip and rise, the formulas for constant acceleration don't work; use work & energy formulas.

1- What is the vehicle speed in km/hr after coasting 375 meters with no net elevation change?

2- If the road also has a net rise of 10.5 meters in that same 375 meters, what is the new final speed in km/hr?