Jessica, who turns eighty years old this year, has just learned about blood pressure problems in the elderly and is interested in how her blood pressure compares to those of her peers. She has uncovered an article in a scientific journal that reports that the mean systolic blood pressure measurement for women over seventy-five is

133.4mmHg, with a standard deviation of6.9mmHg.

(a)According to Chebyshev's theorem, at least (Choose one) of the measurements lie between124.775mmHg and142.025mmHg.

(b)According to Chebyshev's theorem, at least (Choose one) of the measurements lie between119.6mmHg and147.2mmHg

.