ans.1
blank 1 = 4
blank 2 = 4
blank 3 = 1
blank 4 = 8
ans.2
blank 1 = 10
blank 2 = 15
blank 4 = 30
ans.3
blank 1 = 1
blank 2 = 2
blank 3 = 2
blank 4 = 1
blank 5 =2
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