The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 261.8 and a standard deviation of 61.5. (All units are 1000 cells/L.) 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 200.3 and 323.3? b. What is the approximate percentage of women with platelet counts between 77.3 and 446.3? a. Approximately % of women in this group have platelet counts within 1 standard deviation of the mean, or between 200.3 and 323.3. (Type an integer or a decimal. Do not round.) b. Approximately % of women in this group have platelet counts between 77.3 and 446.3. (Type an integer or a decimal. Do not round.)