Lunch break: In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was $42.49 with standard deviation $2.89. The weekly amounts are approximately bell-shaped. Part 1 of 3 (a) Estimate the percentage of amounts that are between $36.71 and $48.27. of the amounts fall between $36.71 and $48.27. Part 2 of 3 (b) Estimate the percentage of amounts that are between $33.82 and $51.16. of the amounts fall between $33.82 and $51.16. Part: 2/3 Part 3 of 3 (c) Between what two values will approximately 68% of the amounts be? Approximately 68% of the amounts fall between $ and $