Cedric buys songs at a store that charges $1.20 per song. shumeka buys songs at a different store. the table shown here gives the cost when she buys 6, 7, and 8 songs.

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?