Question 4 (Expected Return, Variance and Standard Deviation - Single Asset investment) Calculating the variance and standard deviation: Sandra is considering investing in a share and is aware that the return on that investment is particularly sensitive to how the economy is performing. Her analysis suggests that four states of the economy can affect the return on the investment. Using the 1) P age table of returns and probabilities below, find the expected return and the standard deviation of the return on Sandra's investment