40. The U.S. Bureau of Labor Statistics reports that the average annual expenditure on food and drink for all families is $5700 (Money, December 2003). Assume that annual expenditure on food and drink is normally distributed and that the standard deviation is $1500.

a. What is the range of expenditures of the 10% of families with the lowest annual spending on food and drink?

b. What percentage of families spend more than $7000 annually on food and drink?

c. What is the range of expenditures for the 5% of families with the highest annual spending on food and drink?