please answer the above question (all parts )

2kg/s of Steam enters an adiabatic nozzle at T=400C and P=5bar. It exits at 2kg/s at P=1 bar and T=350C. a) Before solving, write a generic entropy balance and define terms as they relate to this system. Find the amount of entropy generated in the nozzle. b) A fellow engineer claims to have made a nozzle that has the same pressures but outputs saturated steam. Do you believe her? c) Find the maximum possible velocity of the steam at the outlet consistent with the given pressure