Many high-performance race cars are equipped with a spoiler system that is located on the trunk of the car. Spoilers are necessary to improve the traction of the car in high-speed situations by providing an additional down force to minimize the lift coefficients. A retractable spoiler system is shown. Sketch a kinematic diagram of the mechanism and calculate the degrees-of-freedom.

(a) Precision Position 1 (Fully Retracted) Number of links= 2= (c) 50% Elevation Number of joints= F= (b) Precision Position 2 (d) Precision Position 3 (Fully Elevated) Joint types: 20 b