All three parts please. With how to do it by hand or by financial calculator.

Quantitative Problem: You are given the following probability distribution for CHC Enterprises: State of Economy Probability Rate of return Strong Normal 0.25 0.5 0.25 18% 10% -6% Weak What is the stock's expected return? Round your answer to 2 decimal places. Do not round intermediate calculations. 4.54% 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