Steam at 500 C and 40 bar passes through two turbines arranged in parallel, and their exit streams are combined into one stream. Turbine 1 has 100% efficiency, while the efficiency of turbine 2 is 75%. Both turbines exhaust at 1 bar. The stream that is formed by combining the exhausts of the two turbines is saturated vapor.

a) Determine the fraction of the total flow rate that passes through each turbine. 

b) Determine the rate of entropy generation. What are the irreversible feature of this process?