Over the last three evenings, Linda received a total of 74 phone calls at the call center. The second evening, she received 6 fewer calls than the first evening. The third evening, she received 2 times as many calls as the first evening. How many phone calls did she receive each evening?

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?