You are given the following probability distribution for CHC Enterprises: State of Economy Probability Rate of return Strong 0.15 18% Normal 0.5 10% Weak 0.35 -5% What is the stock's expected return? Round your answer to 2 decimal places. Do not round intermediate calculations. % What is the stock's standard deviation? Round your answer to two decimal places. Do not round intermediate calculations. % What is the stock's coefficient of variation? Round your answer to two decimal places. Do not round intermediate calculations.