Determine the availability of the system

Question

6 kg of air at 600 K and 5.0 bar is enclosed in a closed system.

1. Determine the availability of the system if the surrounding pressure and temperature are 1.0 bar and 300 K.
2. If the air is cooled a constant pressure to the atmospheric condition, determine the availability and effectiveness.

For air take, C_p = 1.005 kJ/kg K,

C_v = 0.718 kJ/kg K and R = 0.287 kJ/kg K.