(S 9.3) A random sample of size 17 is taken from a normally distributed population, and a sample variance of 20 is calculated. If we are interested in creating a 95% confidence interval for 2, the population variance, then: a) What is the appropriate degrees of freedom for the x2 distribution? Number b) What are the appropriate X and X values, the right and left Chi-square values? Round your responses to at least 3 decimal places. x = Number Number