Cold 80 psia air is to be heated from 80 oF to 125 oF using hot 20 psia air that is cooled from 200 oF to 134 oF as they pass through a steady-state heat exchanger. Answer the following questions on the basis of one unit of cold air mass flow rate. What is the hot air mass flow rate per unit of cold air flow rate? What is the change in the hot air specific entropy per unit of cold air flow rate? What is the change in the cold air specific entropy per unit of cold air flow rate? What is the net entropy generation per unit of cold air flow rate? Ds=Cp*ln(Tout/Tin).