The cardiovascular counter-current heat exchanger has an overall heat transfer coefficient of 100 W/m² · K. Arterial blood enters at 37°C and exits at 27°C. Venous blood enters at 25°C and exits at 34°C. Determine the mass flow rates of the arterial blood and venous blood in g/s if the specific heat of both arterial and venous blood is constant and equal to 3475 J/kg · K, and the surface area of the heat transfer to occur is 0.15 cm².