The car lift at your neighborhood garage is designed such that the radii of the input piston and output plunger are 7.50 x 10-3 m and 0.120 m, respectively. The garage manager likes to use a hydraulic oil in the lift that has a density of 7.80 x 102 kg/m. Compared to the weight of the output plunger, the weight of the input piston is negligible. Determine the force Fi needed at the input piston in order to support the 13,500-N combined weight of a car and the output plunger under the following conditions. (a) The bottom surfaces of the input piston and output plunger are at the same level. N (b) The bottom surface of the input piston is 2.40 m below that of the output plunger. N