Air enters a compressor insulated against heat transfer at a temperature of $37C$ and a pressure of $105$kPa, and at a pressure of $610$kPa and It rises at $287C.$ Neglecting the kinetic and potential energy exchange, and at the same time taking into account that it changes with temperature;

a$)$ The isanthropic efficiency of the compressor,

b$)$ Find the outlet temperature of the air in case the compression is reversible.