Problem 3. Assume that you are a thermal engineer working for a cryogenics company.Your project is to design the operational parameters for controlling fluid mixture (liquidand gas) temperature that is cooled by ice cubes in an insulated container. To help youto conduct this project successfully, the following questions are to be answered (20%;10 pts each): 
【題組】Q1. Sketch the temperature of the ice cube versus time, as it, solely exposed to air at aroom temperature, slowly turns from a solid state to a complete liquid state.