EAMCET Engineering 2009 Solved Paper

An ideal gas is subjected to cyclic process involving four thermodynamic states, the amounts of heat (Q) and work (W) involved in each of these states are
‌Q1=6000J,‌‌Q2=−5500J;‌‌Q3=−3000J;
‌Q4=3500J
‌W1=2500J;‌‌W2=−1000J;‌‌W3=−1200J;
‌W4=xJ.
The ratio of the net work done by the gas to the total heat absorbed by the gas is η. The values of x and η respectively are