The ceramic coffee cup in the figure below, with m = 135 g and c = 1090 J/(kg · K), is initially at room temperature (24.0° C). If 275 g of 80.3 C coffee and 12.2 g of 5.00° C cream are added to the cup, what is the equilibrium temperature of the system? Suppose that no heat is exchanged with the surroundings, and that the specific heat of coffee and cream are the same as the specific heat of water.