In the P-V diagram, l is the initial state and F is the final state. The gas goes from I to F by(i) IAF, (ii) IBF, (iii) ICF. The heat absorbed by the qas:

Heat absorbed in a thermodynamic process is given by:ΔQ=ΔU+ΔWHere, ΔU is same for all the three processes as it depends only on initial and final states.But ΔWI=+ve,ΔWII=0,ΔWIII=−veor ΔWI>ΔWII>ΔWIIIthen ΔQI>ΔQII>ΔQIII