The weight acts vertically downwards.
The reaction force acts perpendicularly to the surface/slope.
The kinetic friction force due to skidding acts parallel to the surface in the direction against the motion.
Force due to a gravitational acceleration component acts parallel to the surface directed downslope.
You've slammed on the brakes and your car is skidding to a stop while going down a 20-degree hill.
Draw a Free Body Diagram of this.
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