The stock of Business Adventures sells for $40 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: Required: a. Calculate the expected holding-period retum 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.) b. Calculate the expected return and standard deviation of a portfolio invested haif in Eusiness Adventures and half in Treasury bills. The return on bills is 4% (Do not round intermediate caiculotions. Round your answers to 2 decimal places.)