The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.11"F and a standard deviation of 0.63"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 97.48"F and 98.74"F? b. What is the approximate percentage of healthy adults with body temperatures between 96.85 F and 99.37"F? a. Approximately % of healthy adults in this group have body temperatures within 1 standard deviation of the mean, or between 97.48"F and 98.74"F. (Type an integer or a decimal. Do not round.)