1 2 3 4 Question 3 of 4 (1 point) | Attempt 1 of 1 View question in a popup | 1h 15m Remaining 8.2 Section Exercise 11, 12 Find the critical value 'a/2 needed to construct a confidence interval of the given level with the given sample size. Round the answers to three decimal places. Part 1 of 4 (a) For level 98% and sample size 8 CriticaValue- X Part 2 of 4 (b) For level 99% and sample size 13 Criticavalue= Part 3 of 4 (c) For level 99.5% and sample size 28 Criticavalue Part 4 of 4 (d) For level 95% and sample size 10 Criticavalue