Calculate

(a) the expected return and

(b) the volatility (standard deviation) of a portfolio that consists of a long position of $10,000 in Johnson & Johnson and a short position of $2000 in Walgreens.

suppose Johnson & Johnson and Walgreens Boots Alliance have expected returns and volatilities shown below, with a correlation of 22%.
Expected Return Standard Deviation Johnson & Johnson 7% 16%
Walgreens Boots Alliance 10% 20%.

AppendixLO1