Three identical blocks of differing temperatures are stacked on top of one another and insulated from the environment, as shown in the figure.

(A) Plot the temperature of the blocks versus time. Label each line and indicate all important temperatures on the graph.

(B) Discuss any changes in entropy for block C. Explain your answer at the microscopic level.

(C) Discuss the entropy of the system consisting of all three blocks from initial to final state. Justify your answer.