The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.39F and a standard deviation of 0.68 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 97.71F and 99.07F? b. What is the approximate percentage of healthy adults with body temperatures between 96.35F and 100.43F? a. Approximately % of healthy adults in this group have body temperatures within 1 standard deviation of the mean, or between 97.71F and 99.07F. (Type an integer or a decimal. Do not round.)