Steam enters a turbine at a rate of 8 kg/s. The conditions at the inlet are p1 = 6 MPa and T1 = 500 C, and the pressure at the exit is p2 = 0.1 MPa. The isentropic efficiency of the turbine is 0.8. Find (a) the power delivered by the turbine and (b) the change in specific entropy of the steam passing through the turbine.