A Brayton cycle uses air and produces a net work of 14000 Btu/s with an inlet state of 60°F, 14.7 psi and a compression ratio of 16. The heat added in the combustion process is 400 Btu/lbm. If the thermal efficiency is 0.547 Determine: Using variable specific heat method 1) The highest temperature in the cycle 2) The mass flow rate of the air