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

[EX Q]: Air resistance is _ at zero velocity.
[EX A]: zero

[EX Q]: Cockatiels average _ to five eggs per nest, with an egg typically laid every other day.
[EX A]: four

[EX Q]: Twins are a genuine rarity, and only a few births of _ or more foals have ever been recorded.
[EX A]:
three