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64seconds1 e, `' R5 c" ]. o
; D% b1 Q) T# X2 _9 O
1 to 4 have 3floors = 48 sec
& [# ?$ i6 t! a% _0 p( davg. 48/3 = 16sec5.39.217.76, s" t) b# {6 p3 v
8 R; T* b4 F7 W8 u
4 to 8 have 4floors = 16x4
( b- @0 z3 \! T8 L) l3 @= 64secs
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