Real-world Problem for Chapter 9 - To drink or not to drink? (RWP9)

Write a complete solution to the following problem using the GOAL problem-solving protocol.  Carefully consider any assumptions you make in solving the problem, along with an explanation of how the answer would vary under different conditions.  Clearly specify any estimations you make, and be sure your answer will agree with anyone else who correctly analyzes the same problem.

Someone gives you a drink at a Halloween party.  You notice that the ice cubes in the drink are not floating, but have sunk to the bottom of the glass.  What is the alcohol content of this drink?  If you are the designated driver for your friends, should you drink this beverage?  If you do not drink it and simply hold it in your hands, will the ice cubes eventually float?