A real estate company is interested in the ages of home buyers. They examined the ages of thousands of home buyers and found that the mean age was 41 years old, with a standard deviation of 10 years. Suppose that these measures are valid for the population of all home buyers. Complete the following statements about the distribution of all ages of home buyers. (a)According to Chebyshev's theorem, at least ▼(Choose one) of the home buyers' ages lie between  21years and 61 years. (b) According to Chebyshev's theorem, at least 8/9 (about 89%) of the home buyers' ages lie between  years and years. (Round your answer to the nearest whole number.)

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