2. Consider a population of 1024 mutual funds that primarily invest in large companies. You have determined that the mean one-year total percentage return achieved by all the funds is 8.20 and that the standard deviation is 2.75. a. According to the empirical rule, if a population has a normal distribution, what is the approximate one-year percentage return range in which 95% of mutual funds achieve? b. What is the necessary condition for using the empirical rule? c. It is noticed that the shape of this distribution according to a histogram is very much skewed to the left, what information can you infer from Chebyshev's rule