(5 points) Randomly selected 15 student cars have ages with a mean of 7.4 years and a standard deviation of 3.0 years, while randomly selected 30 faculty cars have ages with a mean of 5.7 years and a standard deviation of 3.3 years. Use a 0.01 significance level to test the claim that student cars are older than faculty cars. Assume the ages of car follows a normal distribuitons with the same variances. The test statistic is The critical value is Is there sufficient evidence to support the claim that student cars are older than faculty cars? O A. Yes OB. NO 2. Construct a 99% confidence interval estimate of the difference / - My, where u, is the mean age of student cars and u is the mean age of faculty cars.