Find the critical value f , 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 (=) For level 90% and sample size 8 Critical value = 1 X 5 Part 2 of 4 (b) For level 99% and sample size 11 Critical value = Part 3 of 4 (c) For level 95% and sample size 25 Critical value = Part 4 of 4 (d) For level 99.3% and sample size 10 Critical value =