4. Chocolate cake is placed in a small insulated container in an attempt to keep it warm. The cake has a mass of 4 pounds and has a volume of 120 in. The cake is initially at 300F. The container starts at an initial temperature of 70F. The inside dimensions of the container are 7"x7"x9". Calculate the final equilibrium temperature of the cake. Remember to state your assumptions and draw a schematic. Comment on the validity of the method you used to calculate your answer. (Specific heat of cake = 0.355 Btu/lbR)