In the last quarter of 2007, a group of 64 mutual funds had a mean return of 2.8% with a standard deviation of 5.7%. If a normal model can be used to model them, what percent of the funds would you expect to be in each region? Use the 68-95-99.7 rule to approximate the probabilities rather than using technology to find the values more precisely. Be sure to draw a picture first. a) Returns of 14.2% or more b) Returns of 2.8% or less c) Returns between - 2.9% and 8.5% d) Returns of less than - 14.3% a) The expected percentage of returns that are 14.2% or more is%. (Type an integer or a decimal.)