Fully justify your answer, showing calculations (in Excel is fine). b) For your answer to part (a), did you perform a two-sample test (Ch. 10 of our textbook) or an ANOVA test (Ch. 11 of our textbook)? Briefly, explain your choice: Why not two-sample? Or, Why not ANOVA? c) Determine the p-value for (a). d) Construct and interpret a 95% confidence interval estimate of the difference between the population means in the two branches. e) With 95% confidence, can you conclude that the population variances are different? Again, fully justify your answer, showing work (in Excel)