Suppose Johnson & Johnson and Walgreen Boots Alliance have expected returns and volatilities shown here, with a correlation of 20%. Calculate a. the expected return and b. the volatility(standard deviation) of a portfolio that consists of a long position of $12,000 in Johnson & Johnson and a short position of $2,000 in Walgreens.

Expected Return Standard Deviation

Johnson & Johnson 7.7% 16.5%

Walgreens 9.4% 19.2%