Twenty-five randomly selected students were asked the number of movies they watched the previous week.The results are as follows:

# of movies frequency

0 5

1 9

2 6

3 4

4 1

Use the information above to complete the following:

A: Find the sample mean

B. Find the sample standard deviation

C: Find the first quartile

D: Find the median

E: Find the third quartile

You must show all your calculations to support your answers.