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

Q: Some people routinely sleep only _ hours a night but feel fine during the day.

A: four
****
Q: Most orangutans are four to _ feet long, some can reach a length of six feet.

A: five
****
Q: Japan sits on the intersection of _ tectonic plates thatgenerate a constant seismic risk.

A:
four
****