(S 9.3) A random sample of size 12 is taken from a normally distributed population, and a sample variance of 15 is calculated. If we are interested in creating a 95% confidence interval for , the population variance, then: a) 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 x = Number b) What are the values for the lower and upper limits of the confidence intervals? Enter your values separately, in the spaces provided. Round each of your responses to at least 3 decimal places. Lower limit = Number Upper limit = Number