Mirrors are used to concentrate sunlight and heat a molten salt mixture to 500K. A heat engine is then used to convert the thermal energy to useful mechanical form. Compare a Carnot engine to a Stirling engine with the same operating parameters. In each case the engine operates between the maximum temperature of T₊ = 500K and a minimum temperature of T₋ =300K (ambient temperature). Maximum volume for the engine in each case is 3 L, minimum volume is0.2 L. Assume that the minimum pressure attained in the cycle is 1 atm, and the working fluid is air with γ = 1.4. Compute and compare the efficiency and net useful work per cycle for the two engines.