Independent samples from two different populations that are both approximately normally distributed yield the following data: x1 = 63.4 , x2 = 63.3 , $1 = 7.8, $2 = 1.4, n1 = 17, n2 = 20. Construct a 99% confidence interval for the difference of the population means, /1 - /2 . Round your answers to 3 places after the decimal point, if necessary. If it is not appropriate to construct a confidence interval in this situation, then enter "0" in both answer boxes below. 99% confidence interval: Submit