consider an investment with the following probability distribution: probability payoff 0.30 36.0 % 0.45 -4.0 0.25 -16.0 calculate the expected return. do not round intermediate calculations. round your answer to two decimal places. % calculate the standard deviation. do not round intermediate calculations. round your answer to two decimal places. % calculate the coefficient of variation. do not round intermediate calculations. round your answer to two decimal places.