Suppose Johnson & Johnson and the Walgreen Company have the expected returns and volatilities shown below, with a correlation of 22.7%. Johnson & Johnson E [R] 6.1% 10.7% SD [R] 16.3% 19.5% Walgreen Company For a portfolio that is equally invested in Johnson & Johnson's and Walgreen's stock, calculate: a. The expected return. b. The volatility (standard deviation). a. The expected return. The expected return of the portfolio is 8.4 %. (Round to one decimal place.) b. The volatility (standard deviation). The volatility of the portfolio is 13.1 %. (Round to one decimal place.)