A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was $1.9, with a standard deviation of 9.9. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. (a) According to Chebyshev's theorem, at least (Choose one) of the X 5 ? scores lie between 32.1 and 71.7. (b) According to Chebyshev's theorem, at least 36% of the scores lie between and . (Round your answer to 1 decimal place.)