A flat plate 1.5 m × 1.5 m moves at 50 km/h in stationary air of density 1.15 kg/m^{3}. The coefficients of drag and lift are 0.15 and 0.75. Determine (i) the lift force (N), (ii) the drag force (N), (iii) the resultant force (N) and (iv) the power required to keep the plate in motion (kW).