Portait preview shoot

ISO= 3200
Aperture= 36
Shutter Speed= 1/160

ISO= 1600
Aperture= 36
Shutter Speed= 1/50

ISO= 800
Aperture= 32
Shutter Speed= 1/50

ISO=400
Aperture= 16
Shutter Speed= 1/50

ISO=100
Aperture=10
Shutter Speed= 1/50

1. What was the best ISO setting to use for your portraits? I think it was ISO 3200
2.  What was your next best photo? ISO 400
3. Were you able to create equivalent exposures to your best photo by changing the aperture and shutter speed? No I was not
4. What did you learn from this activity that you will apply to your real portrait shoot? That the higher ISO I use the more aperture i need to use