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For Problems 26-28, suppose Johnson & Johnson and Walgreens Boots Alliance have expected returns and volatilities shown below, with a correlation of 21%. Expected Return Standard Deviation Johnson & Johnson 17.9% Walgreens Boots Alliance 9.6% 21.6% 6.996 26) Calculate (a) the expected return and (b) the volatility (standard deviation of a portfolio that is equally invested in Johnson & Johnson's and Walgreens stock. 27) For the portfolio in question 26 if the correlation between Johnson & Johnson's and Walgreen's stock were to increase a Would the expected return of the portfolio rise or fall? b. Would the volatility of the portfolio rise or fall? 28) Calculate (a) the expected return and (b) the volatility (standard deviation of a portfolio that consists of a long position of $8500 in Johnson & Johnson and a short position of $1500 in Walgreen's