4. [3] Explain what it means that in an efficient market, you get exactly what you paid for when you invest in an asset. Does the efficient market hypothesis mean you will always get exactly zero returns for your investments? 5. [4] Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations of X and Y. Returns Year X Y 1 13% 27% 2 -5% -29% 3 11% 16%