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

[EX Q]: Females reach sexual maturity around four to _ year-olds.
[EX A]: five

[EX Q]: White sturgeon inhabit _ large river systems, all on the western coast of North America.
[EX A]: three

[EX Q]: Sexual maturity is reached between _ months of age to a year old.
[EX A]:
nine