The archer changes her position to 40 m from the target, and her next arrow lands 2 cm from the bull's-eye. She changes her position to 20 m, and her next arrow lands 1 cm from the bull's-eye.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?