Problem 5. Thermalizing Object (10 points) A body of constant heat capacity, CP and at a temperature Ti is put in contact with a heat reservoir, which is at temperature Tf. Equilibrium between the body and the reservoir is established at constant pressure. (a) (5 points) Determine the total entropy change, S, of the body and the reservior. (b) (5 points) Prove that S is positive for both Ti>Tf and Tf>Ti