Open the following webpage: Free Typing Tests (Webpage)
Once it is open, select Lesson #12 Letters and Numbers in the first drop down menu and 3 Minute Timed Typing Test from the second.
Once you have selected the proper settings, click "Start Test". On the next screen, click "Start" again.
When finished, take a screenshot of your results to submit.
Directions for taking a screenshot can be found here: How to Take a Screenshot (Google Doc)