Draw the appropriate free body diagram for the following problem: Alex (80 kg) is skateboarding across a flat section of the road and he is experiencing a tail wind of +5 N in the horizontal direction. The normal reaction force under each of the four wheels is +400 N. The horizontal reaction force applied to each of the four wheels is +25 N. The force of friction between the road and the wheels of the skateboard is 750 N in the opposite direction as the motion of the skateboard (and Alex). Please label all forces and accelerations