The kentucky derby, the first of three horse races for the triple crown, was won on may 7, 2000 by fusaichi pegasus with a time of 121.3 s. if the race covers 2011.25 m, what is the horses's average speed?

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?