An air standard cycle is executed in a closed system with 0.001 kg of air, and it

Question:

An air standard cycle is executed in a closed system with 0.001 kg of air, and it consists of the following three processes: (1) v = constant during heat addition from 95 kPa 20oC to 450 kPa, (2) isentropic expansion to 95 kPa, (3) p = constant heat rejection to initial state. Using PG model calculate
(a) the net work (Wnet) per cycle in kJ, and
(b) the thermal efficiency (ηth).