A production process manufactures electronic components with timing signals whose duration follows a normal distribution. A random

Question:

A production process manufactures electronic components with timing signals whose duration follows a normal distribution. A random sample of six components was taken, and the durations of their timing signals were measured.
a. The probability is 0.05 that the sample variance is greater than what percentage of the population variance?
b. The probability is 0.10 that the sample variance is less than what percentage of the population variance?