accompanying data display that results from a simple random sample of times (minutes) between eruptions of the Old Faithful geyser. The confidence level of 95% was used. Complete parts (a) and (b) below. TInterval (85.74,91.76) x overbarequals88.75 Sxequals8.897431411 nequals36 Question content area bottom Part 1 a. Express the confidence interval in the format that uses the "less than" symbol. Round the confidence interval limits given that the original times are all rounded to one decimal place. 85.74 minless thanmuless than 91.76 min (Round to two decimal places as needed.) Part 2 b. Identify the best point estimate of mu and the margin of error