(b) the volatility (standard deviation) of a portfolio that is equally invested in Johnson \& Johnson's and Walgreens' stock. a. Calculate the expected return The expected return is %. (Round to one decimal place.) b. Calculate the volatility (standard deviation). The volatility is %. (Round to one decimal place.) (b) the volatility (standard deviation) of a portfolio that is equally invested in Johnson \& Johnson's and Walgreens' stock. a. Calculate the expected return The expected return is %. (Round to one decimal place.) b. Calculate the volatility (standard deviation). The volatility is %. (Round to one decimal place.)