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

[Q]: Bilinear interpolation uses a weighted average of the _ nearest pixels.
[A]: four


[Q]: Ozone is a form of oxygen in which the molecule contains _ atoms instead of two.
[A]: three


[Q]: Atoms are most stable when they have _ electrons in their outer electron energy level.
[A]:
eight