A three-step cycle is undergone by 3.4 mol of an ideal diatomicgas: (1) the temperature of the gas is increased from 200 K to 400 K at constanr volume; (2) the gas is thenisothermally expanded to its original pressure; (3) the gas is thencontracted at constant pressure back to its original volume.Throughout the cycle, the molecules rotates but do not oscillate.What is the efficiency of the cycle?