Two moles of a monatomic ideal gas are placed into a container that controls a piston. At 600 K, there is an expansion of the container from 10 m3 to 40 m3. The temperature then decreases to 300 K, but the volume now expands to 45 m3 and there is no heat transfer. Upon reaching this maximum volume, the container then compresses to 12 m3 at this lower temperature. The volume then returns to its original value of 10 m3 as the temperature returns to 600 K, however, no heat transfer occurs in the last process. 1. How much heat is absorbed by the engine in the first phase? 2. How much work is performed by the engine in the second phase? 3. How much heat is rejected by the engine in the third phase? 4. How much work is performed on the engine in the fourth phase? 5. What is the efficiency of this engine?