The dot plot represents a data set of the number of books read by 5 students over a summer. (A dot plot shows the number of books on the x-axis from 1 to 5. The frequencies are: 1 above 1, 1 above 2, 1 above 3, 1 above 4, and 1 above 5). If an additional student who read 10 books is added to this data set to create a new data set of 6 students, which of the following measures will be greater for the new data set than for the original data set?

I. The median number of books
II. The mean number of books