The car in the figure climbs a gradient of 1 in 20 (sin θ = 0.05) at a steady 54 km/h in still air. The vehicle, resistance and transmission data are given in the figure. Taking g = 9.81 m/s² and the rolling resistance as 0.015 × weight, determine (a) the tractive effort required at the driving wheels (answer in N), (b) the engine power required (answer in kW) and (c) the engine torque (answer in N·m).