In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radius of 4.19 cm.

In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radius of 4.19 cm. This pressure is transmitted by a liquid to a second piston of radius 20.9 cm. What force must the compressed air exert in order to lift a car weighing 12000 N? Answer in units of N. What air pressure will produce this force? Answer in units of Pa.