A piece which is having 25.40 g of iron and a 22.70 g piece of gold at the 100.0 degree C were dropped into the 1000.0 mL of water at 17.35 degree C. The molar heat capacities of gold and iron are 25.41 J/mol. degree C and 25.19 J/(mol. degree C), respectively. Calculate the final temperature of the pieces of metal and water?