A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the following results:

11, 9, 8, 10, 10, 10, 8, 12, 11, 7, 6, 9, 10, 8, 10

1. Find the point estimate of the population mean.
2. Construct the 95% confidence interval for the mean population length reading time.
3. What is the margin of error?
4. How can we reduce the margin of error? Please show work