Quantitative Problem: You are given the following probability distribution for $CHC$ Enterprises:

State of Economy

Probability.

Rate of return

Strong

$0\mathrm{.}15$

$20\%$

Normal

$0\mathrm{.}55$

$9$

Weak

$0\mathrm{.}3$

$-5$

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.