Given the data set:

a. 1. You need to order it from least to greatest:

2. You can identify the Range. Therefore, the minimum point of the whisker must be on:

And the maximum point on the whisker must be on:

3. Determine the Median of the whole data set (the middle value in the data set). Since there 9 values in the set, you can determine that:

4. Find the Median of the bottom half part of the data:

5. And the Median of the top half is:

Knowing all that data, you can create the Box Plot:
b. By definition, the first quartile divides 25% of the data. Therefore, you can determine that the percentage of the data that is above the first quartile is:

c. By definition, the second quartile divides 50% of the data. Therefore, the percentage of the data that is below it is:

Hence, the answers are:
a.
b.

c.
