An atomic absorption method for determination of copper in fuel samples yielded a pooled standard deviation of spooled=0.25g Cu/mL (s). How many replicate measurements are necessary to decrease the 95 and 99% confidence limits to 0.21gCu/mL ? Remember that you always need to round your final answer up to a whole number of replicates. For the 95% confidence limit, N For the 99% confidence limit, N