tonyayp

64seconds6 |& @! p- V, U4 c

: D" O& J! y# l1 K1 to 4 have 3floors = 48 sec5.39.217.77:8898  B( D/ p2 c3 J7 B6 q# ?, S, D
avg. 48/3 = 16sec1 u/ d1 P+ o( w: |9 b* T% n! W! U
) h* g% v% R8 e0 D5 `
4 to 8 have 4floors = 16x4
) [! u# r! Q: Q& [5.39.217.77:8898= 64secs