Lia has 1000 to put in a savings account. she is choosing between two banks. bank a offers 5% compounded quarterly and bank b offers 5.1% compounded semiannually if lia plans on keeping her money in a savings account for a year, which bank would pay her more interest and by how much

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?