A quantitative data set has mean 20 and standard deviation 3. Apply Chebyshev's rule to complete parts (a) and (b) below. a. At least 96% of the observations lie between which two values? At least 96% of the observations lie between 5 and 35. (Round to the nearest whole number as needed.) b. What percent of the observations lie between 11 and 29? At least % of the observations lie between 11 and 29. (Round to the nearest whole number as needed.)