Suppose Johnson & Johnson and the Walgreen Company have the expected returns and volatilities shown below, with a correlation of 22.7%. calculata E[R] SD [R] Johnson & Johnson 6.2% 15.9% Walgreen Company 10.3% 20.7% For a portfolio that is equally invested in Johnson & Johnson's and Walgreen's stock, a. The expected return The expected return of the portfolio is % (Round to one decimal place) b. The volatility (standard deviation) The volatility of the portfolio is % (Round to one decimal place.) Enter your answer in each nf the newer han