Jessica surveyed her classmates to find out how many posts they make on social media in a normal day, on average. The following data set shows her results:

10, 11, 12, 5, 7, 8, 16, 10, 11, 11, 5, 8, 9, 11, 17

Which of the following statements are correct?

The value of the mean increases if the outliers are excluded

The value of the mean stays the same if the outliers are excluded

There are outliers below Q1

There are outliers above Q3