Expected return

A stock's returns have the following distribution:

Demand for the Company's Products	Probability of This Demand Occurring	Rate of Return If This Demand Occurs
Weak	0.1	-50%
Below average	0.2	-9
Average	0.5	13
Above average	0.1	37
Strong	0.1	73
	1.0

1. Calculate the stock's expected return. Round your answer to two decimal places. %

2. Calculate the stock's standard deviation. Round your answer to two decimal places. %

3. Calculate the stock's coefficient of variation. Round your answer to two decimal places.