A straight duct is supplied by a tank at pressure latm and temperature 332°K. Heat is added through the duct wall, equivalent to an increase of total temperature by 500°K. The duct is choked (exit Mach numer is unity). The gas is air. a. What is the exit velocity (in m/s)? b. What is the exit pressure (in atm)? c. What is the exit total pressure (in atm)?