Lunch break: In a recent survey of 626 working Americans ages 2534, the average weekly amount spent on lunch as $42.77 with standard deviation $3.00. The weekly amounts are approximately bellshaped. (a) Estimate the percentage of amounts that were less than $39.77. Round the answer to one decimal place. Approximately % of the amounts were less than $39.77. (b) Estimate the percentage of amounts that were greater than $48.77. Round the answer to one decimal place. Approximately D91: of the amounts were greater than $48.77