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

22.8 %22.8%.

	Upper E left bracket Upper R right bracketE [R]	SD left bracket Upper R right bracketSD [R]
Johnson & Johnson	6.7 %6.7%	15.1 %15.1%
Walgreen Company	9.9 %9.9%	20.5 %20.5%

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).