Can anyone help with physioex 9.0 exercise 7 activity 2

can any one help with questions 16-23 for EX 7 activity 2

16.   What lung values changed (from those of the normal patient) in the spirogram when the patient with emphysema was selected? 
Why did these values change as they did?   

17.   Which of these two values changed more for the patient with emphysema, the FVC or the FEV1?   

18.   What lung values changed (from those of the normal patient) in the spirogram when the patient experiencing an acute asthma attack was selected?
Why did these values change as they did?   

19.   How is having an acute asthma attack similar to having emphysema? How is it different?   

20.   Describe the effect that the inhaler medication had on the asthmatic patient. 
Did all the spirogram values return to “normal”? 
Why do you think some values did not return all the way to normal?   

21.   How much of an increase in FEV1 do you think is required for it to be considered significantly improved by the medication?   

22.   With moderate aerobic exercise, which changed more from normal breathing, the ERV or the IRV?   

23.   Compare the breathing rates during normal breathing, moderate exercise, and heavy exercise.