The car in Figure 3 has a mass of 1350 kg. The engine delivers the torque shown, the gear ratios and final-drive ratio are given on the figure, and the transmission efficiency from engine to wheels is 88 %. The car climbs an up-gradient at a low steady speed in 2nd gear (air resistance negligible); the rolling-resistance coefficient is 0.015. Take g = 9.81 m/s^{2} and cos θ ≈ 1 for the rolling resistance. Determine (a) the tractive effort at the driving wheels (in N) and (b) the steepest gradient angle θ the car can climb in 2nd gear (in degrees).