The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 256.9 and a standard deviation of 69.8. (All units are 1000 cells/pL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 47.5 and 466.3? b. What is the approximate percentage of women with platelet counts between 187.1 and 326.7? a. Approximately _____ % of women in this group have platelet counts within 3 standard deviations of the mean, or between 47.5 and 466.3 b. Approximately ______ % of women in this group have platelet counts between 187.1 and 326.7