1a) Fast-Food Bills for Drive-Thru CustomersA random sample of41cars in the drive-thru of a popular fast food restaurant revealed an average bill of$19.55 percar.The population standard deviation is$6.33.Estimate the mean bill for all cars from the drive-thru with97% confidence.Use a graphing calculator and round the answers to at least two decimalplaces.

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1b)Overweight MenFor a random sample of55 overweight men, the mean of the number of pounds that they were overweight was28. The standard deviation of the population is3.8 pounds. Use a graphing calculator and round the final answers to one decimal place.