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? $($ LO$11-3)$