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

[Q]: Most children overcome bed wetting between the ages of _ and ten.
[A]: six


[Q]: Female cats can go into heat for the first time as early as _ months of age.
[A]: five


[Q]: Seeds are easy to germinate and produce plants that flower in _ years.
[A]:
three