A resent report indicated an average family of four 2 parents and 2 children under the age of 16, spends $500 per month on gaoline. Assume the distribution of gasoline consumption expenditures for a family of four follows the normal distribution, with a standard deviation of $75 per month. round your answer to 2 decimals.

a. What percent of families spend more than $45 but less than $500

b. What percent of the families spend less than $425

c. What percnet spends between $425 and $575

d. What percent spends between $575 and $650