5) A geothermal hot spot is discovered underneath the building. It is 200m under the ground, and the temperature is 60C. A newly developed working fluid with a heat capacity of 10,000J/(kgC) and a density of 1,000kg/m3 will be used to exact the geothermal energy and generate electricity. The flow rate of the working fluid cannot be larger than 20mL/s, otherwise, the depletion of the resource is observed. The efficiencies of the heat exchanger and the generator are 90% and 30%, respectively. Assuming that the geothermal energy recovery system can operate continuously and the year-round average temperature on the ground is 20C, calculate the total electrical energy that can be generated per year. (10 points)