Air is entering a 4200-kw turbine that is operating at its steady state. the mass flow rate is 20 kg/s at 807 c, 5 bar and a velocity of 100 m/s. this air then expands adiabatically, through the turbine and exits at a velocity of 125 m/s. afterwards the air then enters a diffuser where it decelerates isentropically to a velocity of 15 m/s and a pressure of 1 bar. using the ideal gas model, determine, (a) pressure and temperature of the air at the turbine exit, in units of bar and kelvin. (b) entropy production rate in the turbine in units of kw/k, and (c) draw the process on a t-s diagram.