In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Perennial grass takes _ to five years before it is mature enough to produce adequate seed.
[EX A]: three

[EX Q]: Cigarette smokers have up to a _ times higher incidence of bladder cancer than non-smokers.
[EX A]: four

[EX Q]: Asian women are _ times more likely to attempt suicide than their white counterparts.
[EX A]:
three