Air at a pressure and temperature of 400 kPa and 300Kcontained in a large vessel is discharged through an isentropic nozzle into a space at a pressure of 100 kPa. Find the mass flow rate if the nozzle is (a) convergent and (b) convergent divergent with optimum expansion ratio. In both cases, the minimum cross-sectional area of the nozzle may be taken to be 6.5cm².