Question: In a recent year, about two-thirds of U.S. households purchased ground coffee. Consider the annual ground coffee expenditures for households purchasing ground coffee, assuming that these expenditures are approximately distributed as a normal random variable with a mean of $65.16 and a standard deviation of $10.00.

1. Find the probability that a household spent less than $35.00.
2. Find the probability that a household spent more than $60.00.
3. What proportion of the households spent between $40.00 and $50.00?
4. 99% of the households spent less than what amount?

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