64seconds
' K5 V/ _0 ~8 v) O1 ~5.39.217.775.39.217.77; u/ M* H5 q7 y L
1 to 4 have 3floors = 48 sec
* }8 c5 k' z, e z5 ]; {: K1 Y" K. Oavg. 48/3 = 16sectvb now,tvbnow,bttvb" ^4 j9 B, ^9 U c0 V
5.39.217.775 X) K5 S3 \$ q" x$ V, Y& Q
4 to 8 have 4floors = 16x45.39.217.778 d9 j r4 }4 @, S3 P- z0 T
= 64secs |