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The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 250.9 and a standard deviation of 67.1. (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 1 standard deviation of the mean, or between 183.8 and 318.0? b. What is the approximate percentage of women with platelet counts between 116.7 and 385.1? a. Approximately % of women in this group have platelet counts within 1 standard deviation of the mean, or between 183.8 and 318.0. (Type an integer or a decimal. Do not round.) b. Approximately % of women in this group have platelet counts between 116.7 and 385.1. (Type an integer or a decimal. Do not round.)