4. Consideration is being given to the use of a steady flow expander (or gas turbine) powered by a stream of hot compressed gases. It is required that the gases should discharge from the turbine at 101.3kPa and 20C. It is also required that the turbine produce 930kW for a flow rate of 380mol/s of gases. Estimate the initial temperature and pressure required for the gas stream (for the purpose of an estimate, assume that the turbine will operate isentropically and the gases are ideal with constant Cp of 44J/molK