Suppose Johnson & Johnson and the Walgreen Company have the expected returns and volatilities shown below, with a correlation of 21.2 %21.2%.

	Upper E left bracket Upper R right bracket E [ R ]	SD left bracket Upper R right bracket SD [ R ]
Johnson & Johnson	7.3 %7.3%	16.1 %16.1%
Walgreen Company	10.8 %10.8%	19.8 %19.8%

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).