Can you see the oil

Can you see the oil and water layers separately in both the test tubes immediately after?
a) You stop shaking them ?
A. No,
b) Leave the test tubes undisturbed for sometime and observe. Does the oil layer separate out ?
A. Yes. After allowing test tubes to settle for sometime. The oil layer floats on water layer.
c) In which test tube does this happen first ? Give your observations.
A. The oil layer and water layer separate quickly in test tube B first.