Empirical Rule Assume the ages of past, present, and future presidents have a bellshaped distribution with a mean of 54.8 years and a standard deviation of 6.2 years.

a. What does the empirical rule say about the percentage of ages between 48.6 years and 61.0 years (or within 1 standard deviation of the mean)?

b. What does the empirical rule say about the percentage of ages between 42.4 years and 67.2 years?