A hair salon in Cambridge, Massachusetts, reports that on seven randomly selected weekdays, the number of customers who visited the salon were 68,73,41,25,43,23, and 58 . It can be assumed that weekday customer visits follow a normal distribution. (You may find it useful to reference the trable.) DexictureClick here for the Excel Data. File a. Construct the 90% confidence interval for the average number of customers who visit the salon on weekdays. (Round final answers to 2 decimal places.) b. Construct the 99% confidence interval for the average number of customers who visit the salon on weekdays. (Round final answers to 2 decimal places.)