• Create a class hierarchy. • Avoid code duplication. • Make the project extendible. • Use super call in constructors. • Use super call in methods (if necessary). • Use method overriding. • Override the Object class toString method (instead of using a display method). • Be sure to remove all duplication, including the EmployeeList and Driver classes • Be sure to add ALL necessary documentation.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.