3. [4 points] You are considering purchasing Coca-Cola stock but would like to know more information about risk and returns before you make the purchase. Next year's possible returns for Coca-Cola and their probabilities of occurring are listed in the table below. Probabilities Possible Returns 20% 3% 55% 8% 25% 12% Calculate: a. The expected return for Coca-Cola. b. The standard deviation and coefficient of variation for Coca-Cola