please answer questions a and b

Suppose Johnson & Johnson and Walgreen Boots Alliance have expected returns and volatilities shown here, with a correlation of 22%. 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 $2,000 in Walgreens. Data Table (Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet.) Johnson & Johnson Walgreens Boots Alliance Expected Return 7.0% 10.0% Standard Deviation 16.0% 20.0% Print Done ... a. Calculate the expected return. The expected return is %. (Round to one decimal place.)