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The manager of The Cheesecake Factory in Memphis reports that on six randomly selected weekdays, the number of customers served was 285,85,160,165,65, and 250 . She believes that the number of customers served on weekdays follows a normal distribution. Click here for the Excel Data File a. Calculate the margin of error with 95% confidence. Note: Round your final answer to 2 decimal places. b. Construct the 95% confidence interval for the average number of customers served on weekdays. Note: Round your final answers to 2 decimal places. c. How can the margin of error reported in part a be reduced