Answers:

1. 2nd line

2. below the 1st line and 4th line

3.  1st line and 4th space

4. 3rd space

5. 2nd line

6. 5th line

7.4th line

8. 2nd space

9. 5th line

10. 2nd line

Explanations:

The three Major scales or C, G and F.  

In C Major scale the first note is in C (ledger line) D- E-F-G-A-B-C. There is no sharp or no flat.  

G Major scale has one sharp in the fifth line. The first note is in G that is why it is called G Major.  But the note the fall on F will be called now as F-sharp or F#.

F Major scale has one flat on the third line. The first note is in F or fa that is why it is called F Major. The ton of B will be lower by 1/2 because it has a flat. the B will now be called B-flat. or ti-flat.  

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