Oil with a speed of 7358 kg/h and a heat capacity c_pm (oil) = 2.01 kJ kg^- K^-1 is cooled from 394.3 K to 338.9 K in a countercurrent heat exchanger where water enters with a temperature of 294.3 K and out with a temperature of 305.4 K. Calculate the flow rate (equal to the mass flow) of the water and the heat transfer coefficient, U, when the area of the heat exchanger is 5.31 m². The heat capacity of water is = 4,183 kJ kg^-1 K^-1