An open feedwater heater operates steadily with 30 kg/hr of liquid water entering one inlet at 40 °C and 700 kPa. Water vapor enters a second inlet at 200 °C and 700 kPa. Saturated liquid exits with a pressure of 700 kPa. The dead state temperature and pressure is 20 °C and 100 kPa, respectively. (a) Draw and label a schematic of the system. (b) Determine the mass flow rate (kg/s) of water vapor needed and (c) the rate of exergy destruction (kW)