In the last quarter of? 2007, a group of 64 mutual funds had a mean return of 3.0?% with a standard deviation of 4.8?%. Consider the Normal model ?N(0.03?,0.048?) for the returns of these mutual funds.
?a) What value represents the 40th percentile of these? returns? (Round to two decimal places as? needed.)
?b) What value represents the 99th? percentile? (Round to two decimal places as? needed.)
?c) What's the? IQR, or interquartile? range, of the quarterly returns for this group of? funds? (Round to two decimal places as? needed.)