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.

[Q]: Coyotes can often live six to ____ years in the wild.
[A]: eight


[Q]: ATMs are expensive machines with an average useful life of ____ to fifteen years.
[A]: ten


[Q]: Modern instruments have even ____ strings.
[A]:
four