Over the past 5 years, the River Valley Company has posted a 3% risk-free rate and the following performance on stocks A and B. Years: 1 two 3 4 5 Action: A 17% 28% -2.10 5% twenty-one% Action: B twenty-one% 24% 28% 8% 27% Find the coefficient of variation for actions A and B. Determine and explain which action performed better.