How much of a musical genious are you?

To find out whether you are a Mozart or a Fridge

1 Who wrote twinklie twinkle little star?
2 Which clef does a bassoon play in?
3 How many accidentals are there in the G minor key signature?
4 How many possible inversions are are possible in a tonic triad?
5 How many notes are there in an octave?
6 What does sFz stand for?
7 How many crotchet beats are in a 12/8 bar?
8 How many keys are on a baby grand piano?