Use the following information on states of the economy and stock returns to answer Questions 4-7: Page 388 4. Expected Returns (LO1, CFA1) Calculate the expected returns for Roll and Ross by filling in the following table (verify your answer by expressing returns as percentages as well as decimals): 5. Standard Deviations (LO1, CFA2) Calculate the standard deviations for Roll and Ross by filling in the following table (verify your answer using returns expressed in percentages as well as decimals)