Lunch break: In a recent survey of 655 working Americans ages 25 -34, the average weekly amount spent on lunch was $44.97 with standard deviation $2.77. The weekly amounts are approximately bell-shaped. (a) Estimate the percentage of amounts that are between $39.43 and $50.51. Approximately 95% V of the amounts fall between $3943 and $50.51. (b) Estimate the percentage of amounts that are between $36.66 and $5328. of the amounts fall between $36.66 and $53.28. (c) Between what two values will approximately 68% of the amounts be? Approximately 68% of the amounts fall between $E] and $E]