Somebody, please answer quickly.

The stem-and-leaf plot displays the amount of time, in minutes, that 10 students spent volunteering in their community one day.

1 7
2 0, 7, 9
3 1, 6
4 0
5 5, 8
6 2
Key: 4|0 means 40


Part A: Calculate the mean and median for the data given. (2 points)

Part B: A student would like to show their teacher that they have spent more time volunteering in their community for the day. Which measure of center should the student give to their teacher? Explain your answer. (2 points)