I upvote immediately based on correct answers.

In the last quarter of 2017 , a group of 64 mutual funds had a mean return of 4.2% with a standard deviation of 5.4% 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 percentages rather than using technology to find the values more precisely. Be sure to draw a picture first. a) Returns of 15.0% or more b) Returns of 4.2% or less c) Returns between 12.0% and 20.4% d) Returns of more than 9.6%