Air, an ideal gas, passes through the turbine and heat exchanger assembly shown schematically. The process takes place in a stable state and the operating conditions are given in the figure. In the case where there is no heat transfer and the change of kinetic energy and potential energy is neglected, a) T3 temperature (K) and mass flow rate of air passing through turbines (kg/s), b) The power produced in the second turbine (kW) and the amount of heat transferred in the heat exchanger (kW) calculate.