The market and Stock A have the following probability distributions:

Probability Return on Market Return on Stock A 0.25 28% 19% .3 15% 12% .45 11% 10% 

I am trying to calculate the expected rates of return for the market and Stock A.

I am also trying to calculate the standard deviations for the market and Stock A.

Lastly I want to calculate the coefficient of variation for the market and Stock A.