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Problem 6-13Historical Realized Rates of ReturnStocks A and B have the following historical returns:Year2012-18.30%-15.70%201334.5024.80201415.0026.002015-4.25-12.10201632.2536.20Calculate the average rate of return for each stock during the5-year period. Round your answers to two decimal places.Stock A%Stock B%Assume that someone held a portfolio consisting of 50% of StockA and 50% of Stock B. What would have been the realized rate ofreturn on the portfolio in each year? What would have been theaverage return on the portfolio during this period? Round youranswers to two decimal places.YearPortfolio2012%2013%2014%2015%2016%Average return%Calculate the standard deviation of returns for each stock andfor the portfolio. Round your answers to two decimal places.rArBPortfolioStd. Dev.%%%If you are a risk-averse investor then, assuming these are youronly choices, would you prefer to hold Stock A, Stock B, or theportfolio?-Select-Stock AStock BPortfolio