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

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

[EX Q]: Echocardiography demonstrates in clear, graphic fashion the _ cardiac chambers and four valves.
[EX A]: four

[EX Q]: Hurricanes have _ categories depending on wind speeds.
[EX A]:
five