The table to the right shows the results of a survey in which 400 adults from the East, 400 adults from the South, 400 adults from the Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Complete parts (a) and (b) Adults who say that traffic congestion is a serious problem East 37% South 31% Midwest 25% West 54% (a) Construct a 99% confidence interval for the proportion of adults from the East who say traffic congestion is a serious problem. The 99% confidence interval for the proportion of adults from the East who say traffic congestion is a serious problem is ( ),( ) (Round to three decimal places as needed.) (b) Construct a 99% confidence interval for the proportion of adults from the Midwest who say traffic congestion is a serious problem. Is it possible that these two proportions are equal? Explain your reasoning. The 99% confidence interval for the proportion of adults from the Midwest who say traffic congestion is a serious problem ( ),( ) (Round to three decimal places as needed.)