The body temperatures of a group of healthy adults have a​ bell-shaped distribution with a mean of 98.12 F and a standard deviation of 0.41 F. Using the empirical​ rule, find each approximate percentage below.

a.
What is the approximate percentage of healthy adults with body temperatures within 1 standard deviation of the​ mean, or between 97.71 F and ​98.53 F? ___

b.
What is the approximate percentage of healthy adults with body temperatures between 97.30 F and 98.94 ​F? ___