Hi, need help with lower and upper bound, thank you.

The following data represent the commute time (in minutes) x and a score on a well-being survey y. The equation of the least-squares regression line is y = - 0.0463x + 69.9710 and the standard error of the estimate is 0.3292. Complete parts (a) through (e) below. 25 125 0 69.0 68.7 67.5 67.4 66.3 65.9 64.3 . . . (a) Predict the mean well-being index composite score of all individuals whose commute time is 40 minutes. y = 68.11 (Round to two decimal places as needed.) (b) Construct a 90% confidence interval for the mean well-being index composite score of all individuals whose commute time is 40 minutes. Lower Bound = 67.60 (Round to two decimal places as needed.) Upper Bound = 68.62 (Round to two decimal places as needed.)