1.5 One mole of a perfect gas performs a quasistatic cycle which consists of the following four successive stages: (i) from the state

(P1, V2) at constant pressure to the state (P1, V2), (ii) at constant volume to the state (P2, V2), (iii) at constant pressure to the state

(P2, V1), (iV) at constant volume back to the initial state (P2, V1).

Find the work done on the gas in the cycle and the heat absorbed by the gas in the cycle.