I'm not sure how to figure this out

Use the sample information X = 43, o=3, n = 11 to calculate the following confidence Intervals for / assuming the sample is from a normal population. 5 points (a) 90 percent confidence. (Round your answers to 4 decimal places.) Skipped The 90% confidence interval is from to eBook Hint (b) 95 percent confidence. (Round your answers to 4 decimal places.) The 95% confidence interval is from to Ask Print References (c) 99 percent confidence. (Round your answers to 4 decimal places.) The 99% confidence interval is from to