Exercise 2.37 described a survey about how many miles per day employees of a company use public

Question:

Exercise 2.37 described a survey about how many miles per day employees of a company use public transportation. The sample values were
0 0 4 0 0 0 10 0 6 0
a. Identify the five-number summary, and sketch a box plot.
b. Explain why Q1 and the median share the same line in the box.
c. Why does the box plot not have a left whisker?