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Suppose Johnson & Johnson and the Walgreen Company have the expected returns and volatilities shown below, with a correlation of 22%. E[R] SD[R] Johnson & Johnson 7% 18% Walgreen Company 10% 20% Consider a portfolio that is equally invested in Johnson & Johnson's and Walgreen's stock (a) Calculate the expected return as a percent. (b) Calculate the volatility (standard deviation) of returns as a percent. (Round your answer to two decimal places.) %