In the "Input Analysis" section of the spreadsheet model, calculate the 95% confidence interval for the sales for each type of p
roduct. (You will not calculate a confidence interval for attendance.) Use the number of events (calculated in cell I3) as part of your calculations. (Note to Excel 2007 users: the CONFIDENCE.NORM function is not supported in Excel 2007. Use the CONFIDENCE function instead.) [5 points]