Determine the sample size n needed to construct a 99%confidence interval to estimate the population mean for the following margins of error when =74.

a) 25

b) 40

c) 50

a) n=_____ ?(Round up to the nearestinteger.)

b) n=______ ?(Round up to the nearestinteger.)

c) n=_______? (Round up to the nearestinteger.)