Lunch break: in a recent survey of 655 working Americans a gas 25 -34, the average weekly amount spent on lunch was $42.63 with standard deviation $3.01. The weekiy amounts are approximately bell-shaped. Part10f3 (a) Estimate the percentage of amounts that are between $36.61 and $48.65. Approximately 95% V of the amounts fall between $36.61 and $48.65. Part:1l3. Part 2 of 3 ('0) Estimate the percentage of amounts that are between $33.60 and 351.66. of the amounts fall between $33.60 and $51.66