Given the following data set: 65, 70, 70, 70, 70, 80, 80, 90, 85, 90. 90. 95. 95, 95, 100 Which representations are correct for this data set?​

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?