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.

Hypertension afflicts about ____ in four American adults, both men and women, of all ages.
one

Marshes are shallow wetlands less than ____ meters deep.
two

Deer mice have four toes on the forefeet and ____ toes on the hind feet.

five