The high temperatures (in degrees Fahrenheit) of a random sample of 5 small towns are: 97.8 98.3 97.7 99.5 99.8 Assume high temperatures are normally distributed. Based on this data, find the 80% confidence interval of the mean high temperature of towns. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place). 80% C.I.= Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.