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The stock of Business Adventures sells for $30 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: o. Calculate the expected holding-period return and standard devation of the holding-period return. All three scenarios are equally Ikely (Do not round intermediate calculations. Round your answers to 2 decimal ploces.) b. Calculate the expected return and standard devation of a portfolio invested half in Business Adventures and half in Treasury bills The retum on bills is 4%. (Do not round intermediate calculotions. Round your answers to 2 decimal places.)