Quantitative Problem: You are given the following probability distribution for CHC Enterprises: State of Economy. Probability. Rate of return Strong 0.20 Normal 0.55 19% 8% -4% Weak 0.25 What is the stock's expected return? Do not round intermediate calculations. Round your answer to two decimal places. What is the stock's standard deviation? Do not round intermediate calculations. Round your answer to two decimal places. What is the stock's coefficient of variation? Do not round intermediate calculations. Round your answer to two decimal places