The stock of Business Adventures sells for $70 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: 3. Calculate the expected holding-period return and standard deviation of the holding-period return. All three scenarios are equally Ikely. (Do not round Intermediate calculations. Round your answers to 2 decimal places.) b. Calculate the expected return and standard deviation of a portfolio invested half in Business Adventures and half in Treasury bill The return on bills is 5\%. (Do not round Intermedlate calculations. Round your answers to 2 declmal places.)