Suppose Johnson & Johnson and the Walgreen Company have the expected returns and volatilities shown below, with a correlation of 21.7%.

Upper E left bracket Upper R right bracket [R] SD left bracket Upper R right bracketSD [R] Johnson & Johnson 7.1% 16.3% Walgreen Company 10.3 % 20.6 % 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 ?? %. (Round to one decimal place.)