Answer:
The notes on the bass clef is a line or space lower than the treble clef. The pitches are also lower. But if you use ledger lines, you can create the same pitch on the Bass clef as the treble clef.
Explanation:
I am a musician so i am 99.9% sure this is right
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Since you didn't include the picture i could be wrong but the most famous 'study of a woman's back' i know of is matisse.