Although she was specifically told not to, Jennifer has been up all night studying for her Physics 102 Final. Just before the Final she runs to Starbucks and orders a venti caf mocha, which is 591 mL of coffee (which is mainly water) and contains a ton of caffeine. But its temperature is 80C, which is way too hot, and she needs caffeine now! Jennifer dumps the coffee into her large insulated container, adds 100 mL of water from kitchen faucet (which is at a temperature of 19 C), adds 9 ice cubes from her freezer (each ice cube has a mass of 12 g and her freezer is kept at -20 C), closes the container and then shakes it until she hears that all the ice has melted. What is the final temperature of Jennifer's caf mocha?