Interpret the results found in the previous parts. Do the confidence intervals suggest a difference in the variation among waiting​ times? Does the​ single-line system or the​ multiple-line system seem to be a better​ arrangement? A. The variation appears to be significantly lower with a single line system. The​ single-line system appears to be better. B. The variation appears to be significantly lower with a​ multiple-line system. The​ single-line system appears to be better. C. The variation appears to be significantly lower with a single line system. The​ multiple-line system appears to be better. D. The variation appears to be significantly lower with a​ multiple-line system. The​ multiple-line system appears to be better. Construct a 95% confidence interval for the population standard deviation at Bank A.sigma Subscript Bank Upper Aminsigma Subscript Bank Upper A(Round to two decimal places as needed.)Construct a 95% confidence interval for the population standard deviation at Bank B.sigma Subscript Bank Upper Bminsigma Subscript Bank Upper B(Round to two decimal places as needed.)Does the single-line system or the multiple-line system seem to be a better arrangement?Construct a 99% confidence interval for the population standard deviation at Bank A.sigma Subscript Bank Upper Aminsigma Subscript Bank Upper A(Round to two decimal places as needed.)Construct a 99% confidence interval for the population standard deviation at Bank B.sigma Subscript Bank Upper Bminsigma Subscript Bank Upper B(Round to two decimal places as needed.)Does the single-line system or the multiple-line system seem to be a better arrangement?