Used this figure
W Y Y Y B Y Y B YY
And plss answer 16-20
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16.
Stamps : Patches = 10:15 = 2:3
17.
Bookmark : Patches = 20:15 = 4:3
18.
Diary : Patches = 12:15 = 4:5
19.
Bookmark : Stamps = 20:10 = 2:1
20.
Diary : Stamps = 12:10 = 6:5
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