(1 point) A statistics practitioner took a random sample of 45 observations from a population whose standard deviation is 28 and computed the sample mean to be 98. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence Interval = C. Estimate the population mean with 99% confidence. Confidence Interval =(1 point) A statistics practitioner took a random sample of 52 observations from a population whose standard deviation is 21 and computed the sample mean to be 97. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 95% confidence, changing the population standard deviation to 59; Confidence Interval = C. Estimate the population mean with 95% confidence, changing the population standard deviation to 10; Confidence Interval =(1 point) Construct the 90% confidence interval estimate of the population proportion p if the sample size is n = 900 and the number of successes in the sample is x = 234.