A thermally insulated cauldron filled with 25kg of potion (Cp=5.0kJ/kgC) at 20 degrees C is fitted with a stirrer, which turns by connection to an elaborate but frictionless pulley system that suspends a totem; its mass is equal to 35kg. Someone allows the totem to fall slowly through a distance of 5m, thereby stirring the potion. Acceleration due to gravity is 9.8m/s2. Determine, a) You will be analyzing the thermodynamic properties of the potion. Draw a schematic diagram of the problem and specify/define your choice of system, boundary, surroundings (and universe). As appropriate, you may additionally note any useful assumptions for analysis. b) The amount of work done on and the change in internal energy of the potion. c) The final temperature of the potion. d) The amount of heat required to return the potion to its initial temperature. e) The total energy change of the universe