Bảng xếp hạng :
Rank ........................Completed............. Item Required
S Fastest time:20 min...........80..............Yes
A Fastest time:25 min ..........60 ............ Yes
B Fastest time:30 min ..........40..............No
C Fastest time:40 min ..........20 .............No
D Fastest time:60 min........... 1 ..............No
F Fastest time:- ...................0 .............No
