7. Average Return and Standard Deviation. In a recent five-year period, mutual fund manager Diana Sauros produced the following percentage rates of return for the Mesozoic Fund. Rates of return on the market index are given for comparison. Calculate (a) the average return on both the fund and the index and (b) the standard deviation of the returns on each. Did Ms. Sauros do better or worse than the market index on these measures? (OH1-3)