Calculate the margin of error and construct the confidence interval for the population mean. Standard Normal Distribution Table a. x = 10.45, n = 137, o = 0.98, a = 0.2 E = 0.000 Round to three decimal places if necessary 0.000 0.000 Round to three decimal places if necessary b. x = 4.76, n = 179, o = 0.44, a = 0.05 E = 0.000 Round to three decimal places if necessary 0.000 0.000 Round to three decimal places if necessary