Suppose Johnson a Johnson and Walgreen Boots Allance have expected returns and volattities shown here, , with a correlation of 23%. Calculate (a) the expected return and (b) the volatility (standard deviation) of a portfolio that consists of a long position of $11,500 in Johnson \& Johnson and a short position of $1,000 in Walgreens. a. Cakculate the expected retum. The expected return is K. (Round to one decimal place.) (Click on the following icon in order to copy its contents into a spreadsheet.)