The mean internet browsing time for Americans is 15 hours per week (Money, November 2019). A sample of 60 Americans is taken to further investigate internet browsing habits. Assume the population standard deviation for weekly browsing time is 4 hours. (a) Internet browsing time of all Americans is [ Select ] (b) The sample size here is [ Select ] (c) The standard error of the mean is (round to 0.0001) [ Select 1 (d) What is the probability that the sample mean will be more than 18 hours? [Hint: Use Central Limit Theorem (CLT).] [Select] (e) What is the probability that the sample mean will be less than 15 hours and 30 minutes? [Hint: 15 hours and 30 minutes = 15.5 hours] [Select ]