looking for the stock that is the MOST RISKY

I ne tollowing probability distributions of returns for two stocks have been estimated: Probability Stock M Stock 0.25 12% 5% 0.6 8% 4% 0.15 6% What is the coefficient of variation for the stock that is the most risky (use the coefficient of variation to rank riskiness) and explain why do you think this stock is most risky