4. Steam enters the first-stage turbine shown in the figure at 40 bar and 500°C with a volumetric flow rate of 90 m³/min. Steam exits the turbine at 20 bar and 400°C. The steam is then reheated at constant pressure to 500°C before entering the second-stage turbine. Steam leaves the second stage as saturated vapor at 0.6 bar. For operation at steady state, and ignoring stray heat transfer and kinetic and potential energy effects, determine the (a) mass flow rate of the steam, in kg/h. (b) total power produced by the two stages of the turbine, in kW. (c) rate of heat transfer to the steam flowing through the reheater, in kW. Steam P₁ = 40 bar T₁ = 500°C (AV)₁ = 90 m³/min Turbine P₂ = 20 bar T₂ = 400°C Reheater 4 Saturated vapor, P4 = 0.6 bar Power Turbine Qreheater P3 = 20 bar T3 = 500°C