The body temperatures of a group of healthy adults have a​bell-shaped distribution with a mean of 98.03 degrees°F and a standard deviation of 0.53 degrees°F. Using the empirical​ rule, find each approximate percentage below.
a. What is the approximate percentage of healthy adults with body temperatures within 2 standard deviations of the​ mean, or between 96.97 degrees °F and 99.09 degrees °​F?
b. What is the approximate percentage of healthy adults with body temperatures between 96.44 degrees°F and 99.62 degrees °​F?