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

21.9 %

	Upper E left bracket Upper R right bracketE [R]	SD left bracket Upper R right bracketSD [R]
Johnson & Johnson	7.3 %7.3%	16.7 %16.7%
Walgreen Company	9.9 %9.9%	19.6 %19.6%

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).