Crownfashions.com wants to estimate the average time that visitors to its website spend browsing the site. In a random sample of 49 visits this week, the average browsing time is 13.6 minutes. Assume you know the population standard deviation is 5.2 minutes. Construct a 95% confidence interval estimate of average browsing time for the population of crownfashion.com visitors this week. Report the upper bound for your interval.

a. 11.66

b. 15.05

c. 7.51

d. 23.42

e. 17.67