Naeem weighs different salad takeout containers. the containers respectively weigh 4.5 ounces, 5.01 ounces, 5.3 ounces, 4.75 ounces, and 4.9 ounces. which is the best whole number estimate of how much all the containers weigh together?

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?