Study equation 10.6 in the textbook: The EPA in the United States tests all car models sold for fuel economy and emissions by running them on a dynamometer. They have the manufacturer quantify the road load of the vehicle via coast- down tests, normalized to a standard atmospheric condition with air density set to 1.17 kg/m3. This reveals the force constants for the total aerodynamic loads (v2), viscous friction effects (v) in the driveline components, and static friction loads primarily from the bearings, brakes and tires on a level road. The 2010 Toyota Prius carries the following specifications via EPA: Force=A Bv Cv2 A= 20.234 lb B=0.1993 lb/mph C=0.01874 lb/mph2 The effective inertia test weight used was 3375 lb. This car has a projected cross-sectional area of 23.4 ft2 and a manufacturer claimed drag coefficient of 0.25. Tire size is P215/45 R17 (Note: Power = force x velocity) a) Back-calculate and compare the aerodynamic drag coefficient of the vehicle using the road load data. b) What power is required to propel the vehicle at, 60 kph, 120 kph. c) What power is required to maintain 100 kph up a 6% road grade (% grade = rise/run) d) At what velocity