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The stock of Business Adventures sells for $60 a share. Its likely dividend payout and end-of-year price depend on the state of the economy by the end of the year as follows: Boom Normal economy Recession Dividend $ 2.00 1.60 0.80 Stock Price $ 70 62 52 Required: a. Calculate the expected holding-period return and standard deviation of the holding-period return. All three scenarios are equally likely. (Do not round intermediate calculations. Round your answers to 2 decimal places.) % Expected return Standard deviation % b. Calculate the expected return and standard deviation of a portfolio invested half in Business Adventures and half in Treasury bills. The return on bills is 4%. (Do not round intermediate calculations. Round your answers to 2 decimal places.) % Expected return Standard deviation %