Questions can be simple or complex in construction, but usually a simple format is more easily understood. Contact the instructor if these instructions need further explanation. The instructor will attempt to answer the fourth question via return email. If the word Submit doesn't show, click the button to submit the question. You will receive a copy of your questions for your records.
Many more links occur on the Web around the topic of downloading and using statistical data.
Be sure to look at the references in reading one, above.