An ice chest at a beach party contains 10 cans of soda at 2 ° C. Each can of soda has a mass of 0.36 kg and a specific heat capacity of 3900 J/(kg · C °). Someone adds a 6.2-kg watermelon at 28 ° C to the chest. The specific heat capacity of watermelon is nearly the same as that of water. Ignore the specific heat capacity of the chest and determine the final temperature T of the soda and watermelon.