i sent a pm to the guy with my answers and got it 100%!! i asked him what results he got from uni

Wotcha mate,

You got it spot on. From the group at uni, only a few could pinpot exactly what bitrate, about most could tell there was a change in quality, a few couldn't tell any difference at all.

We found that some tunes translated nicely to 192k, some of them sounded awful, so mixdown and mastering probably plays a part in it. Different encoders brought different results too, so there's alot that can affect quality.

Nice one for getting it 100% right though. Clearly got the golden ears!
come on then, any of you ****s gonna match me?? post up your answers and i'll post up the correct ones after a bit.