Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[EX Q]: Nymphs are less than ____ millimeters in size.
[EX A]: two

[EX Q]: Respiratory therapists complete two to ____ years of education.
[EX A]: four

[EX Q]: Triangle is a convex polygon with ____ segments joining three non-collinear points.
[EX A]:
three