Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 11. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 67 and 133? (b) What percentage of people has an IQ score less than 78 or greater than 122? (c) What percentage of people has an IQ score greater than 122? (a)% (Type an integer or a decimal.)

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