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

22.9%.

	E [R]	SD [R]
Johnson & Johnson	7.2%	16.4%
Walgreen Company	9.3%	19.9%

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).