Suppose Johnson \& Johnson and Walgreen Boots Alliance have expected returns and volatilities 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 $9,500 in Johnson \& Johnson and a short position of $1,000 in Walgreens. a. Calculate the expected return. The expected return is \%. (Round to one decimal place.) Expected Return Standard Deviation \begin{tabular}{lrr} \hline Johnson \& Johnson & 6.7% & 15.1% \\ Walgreens Boots Alliance & 10.5% & 20.3% \\ \hline \end{tabular}