Jim works for the housing authority and wants to estimate the mean square footage of apartments for budgeting purposes, so he takes a random sample of 96 apartments. If he knows the population standard deviation of square footage of apartments is 72 space f t squared and his sample has a mean of 605 space f t squared, what would be the endpoints (in f t squared) of a confidence interval for the mean square footage of apartments using a:

a.) 90 percent signconfidence level? The low endpoint is
and the high endpoint is
b.) 99 percent sign confidence level? The low endpoint is
and the high endpoint is
c.) 99.9 percent signconfidence level? The low endpoint is
and the high endpoint is
Round your answers to three decimal places, and do not use units.