step by step, please don't use excel

The stock of Business Adventures sells for $25 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 return and standard deviation of the holding-period return. All three scenarios are equally lkely. (Do not round intermedlate calculations. Round your answers to 2 decimal places.) b. Calculate the expected return and standard deviation of a portfolio invested haif in Business Adventures and half in Treasury bills. The return on bilis is 3\%. (Do not round intermediate calculations. Round your answers to 2 decimal places.)