Problem:
A sot's return has the following distribution:
Demand for the Probability of this Rate of Return
Company's Products Demand Occurring if This Demand Occurs
Weak 0.1 (50%)
Below average 0.2 (5)
Average 0.4 16
Above average 0.2 25
Strong 0.1 60
1.0
Calculate the stock's expected return, standard deviation and coefficient of variation.