A population has standard deviation 0 = 17.6. Part 1 of 2 (a) How large a sample must be drawn so that a 99.9% confidence interval for I will have a margin of error equal to 3.9? Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer. A sample size of is needed to be drawn in order to obtain a 99.9% confidence interval with a margin of error equal to 5 3.9. Part 2 of 2 (b) If the required confidence level were 99.8%, would the necessary sample size be larger or smaller? (Choose one) ,because the confidence level is (Choose one) X 5