Can you please explain this

3. A study has been conducted of the airspeed of various bird species. The brown pelican is to be compared to the American oystercatcher. The birds were clocked flying cross-wind with a wind speed of 5 to 8 mph. You would like to specify the difference in airspeed. The following information is obtained. Brown Pelican American Oystercatcher n 9 12 Mean 26.05 mph 30.19 mph Standard Deviation 6.34 mph 3.20 mph 3. What is your estimate for the difference in the mean airspeed? b. What is the standard error for the difference in the mean airspeed? c. What multiplier will you use for a 95% confidence interval? d. Construct a confidence interval for the difference. e. Does that interval support the hypothesis that there is a difference in the airspeed of these two species