Question 2 (50 points): Geothermal water (Cp-4250 J/kg.C) at 75C is to be used to heat fresh water (Cp-4180 J/kg.C) at 17C at a rate of 1.2 kg/s in a double-pipe counter-flow heat exchanger. The heat transfer surface ara is 25 m, the overall heat transfer coefficient is 480 W/ m20 C, and the mass flow rate of geothermal water is larger than that of fresh water. If the effectiveness of the heat exchanger is desired to be s-0.823, determine the mass flow rate of geothermal water and the outlet temperature of both fluids.