The market and Stock A have the following probability distributions:

Probability	Return on Market	Return on Stock A
0.15	15%	18%
0.3	12%	15%
0.55	10%	11%

a. Calculate the expected rates of return for the market and Stock A.

b. Calculate the standard deviations for the market and Stock A.

c. Calculate the coefficient of variation for the market and Stock A.