1/2000 sec, ISO 400 
1/640 sec, ISO 160 
1/100 sec, ISO 20 
1/30 sec, ISO 20 
1/15 sec, ISO 20
I didn’t manually change the ISO in any of these pictures, I shot with the auto changed the app made. For the last picture I had to change the background because the white contrasted the shot too much and couldn’t focus on the subject. The slower the shutter speed was the more motion the picture had.
Nice work.