3. Define risk and investment risk. Please describe standard deviation and the coefficient of variation and how they are used to develop a measure of risk for a stock. The average stock in the S&P 500 has a standard deviation in ROR of 22% and a mean ROR of 12%. Another stock, a publicly-traded venture capital stock, VC Inc., has a standard deviation in ROR of 50% and a mean of 50%. Which stock is riskier and explain your response using the statistics above. Assuming a 12% rate of return on the stock market, a 4% risk-free rate of return, obtain the beta for the company that you analyzed in Question set 1 from Yahoo. Please interpret the beta. What would be that companys cost of common equity based on your calculation?