The annual ground coffee expenditures for households are approximately normally distributed with a mean of $46.97 and a standard deviation of $13.00.

a. Find the probability that a household spent less than $25.00.

b. Find the probability that a household spent more than $60.00.

c. What proportion of the households spent between $30.00 and $40.00?

d. 97.5% of the households spent less than whatamount?