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

Q: Most chick mortality occurs within _ days after hatching.

A: six
****
Q: Dwarf trees are diminutive and shrub-like, reaching _ feet or so at maturity.

A: four
****
Q: Birds begin dying of fowl cholera _ to nine days after exposed to the virus.

A:
four
****