Vectors!!

jeg har denne opgave som jeg ikke rigtig ved hvordan jeg skal lave, håber der er nogle der har lyst til at hjælpe mig.

Draw a picture of a roller coaster car going down a slope that is 40 degrees above the horizontal. Assuming a downward gravitational force of 2000N.
a backward frictional force of 500n, and a normal force of 155n exerted perpendicularly to the slope by the track, what is the resultant force (magnitude and direction) exerted on the car?