The average income tax refund for the 2009 tax year was $3143. Assume the refund per person follows the normal probability distribution with a standard deviation of $916. Complete parts a through d below. a. What is the probability that a randomly selected tax return refund will be more than $2100? 0.8729 (Round to four decimal places as needed.) C b. What is the probability that a randomly selected tax return refund will be between $1300 and $2700? 0.2934 (Round to four decimal places as needed.) c. What is the probability that a randomly selected tax return refund will be between $3200 and $4000? 0.3025 (Round to four decimal places as needed.) d. What refund amount represents the 35th percentile of tax returns? (Round to the nearest dollar as needed.)

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