Need solution using MINITAB and its steps

3. A company is verifying two potential vendors on the timelines of their response. A random sample of size 20 from the first vendor produced an average delay time of 4 days with a standard deviation of 2.1days. A random sample of size 15 from the second vendor yielded an average delay time of 3 days with a standard deviation of 5.2 days. a) Find a 90% confidence interval for the ratio of the variances of the delay times for the two vendors. (4M) b) Can we conclude that the first vendor has a smaller variability regarding delay times than the second? Use a significance level of 0.05. Which vendor do you select? Why? (6M)