An ideal gas with volume V and pressure P is made to expand adibatically to volume V and pressure P2. This is followed by isobaric compression to (P2, V1), followed by increase in pressure to P, keeping volume constant at V. What is the efficiency of the cycle? (Here, gamma is adiabatic constant of gas) 1 P 1-y- 1-7- 1- V V V V R P P R -1