The cooling system of a tractor fitted with diesel engine rejects 0.58 kW of heat per kW of brake power. It requires 0.16 L s⁻¹ of water per kW of heat rejection from the engine to maintain a temperature drop of 6 °C of water as it moves from the top of radiator to its bottom. If the engine develops 45 kW brake power, the required water flow rate in the radiator in L s⁻¹ (round off to 2 decimal places) is _______.