Consider the direct beat transfer from a heal reservoir at T1 to another heat reservoir at temperature

Question:

Consider the direct beat transfer from a heal reservoir at T1 to another heat reservoir at temperature T2, where T1 > T2 > T(. It is not obvious why the Inst work of this process should depend on T(. the temperature of the surroundings, because the surroundings are not involved in the actual heat-transfer process. Through appropriate use of the Carnot-engine formula, show for the transfer of an amount of heat equal 10 |Q| that