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.

Systems information is ____ dimensional because it varies with time.
four

Harpists spend ninety percent of their lives tuning their harps and ____ percent playing out of tune.
ten

Most volcanoes erupt for three to ____ weeks and then rest.

four