The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 256.3 and a standard deviation of 64.8. (All units are 1000 cells/pL.) Using the empirical rule, nd each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 2 standard deviations of the mean, or between 126.7 and 385.9? b. What is the approximate percentage of women with platelet counts between 191.5 and 321.1? a. Approximately D% of women in this group have platelet counts within 2 standard deviations of the mean, or between 126.7 and 385.9. (Type an integer or a decimal. Do not round.)