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

[Q]: New species are believed to arrive in the Mediterranean at the rate of _ to five annually.
[A]: four


[Q]: Most people have a bowel movement anywhere between three times per day to _ times per week.
[A]: three


[Q]: Most scientists currently recognize seven living species of sea turtles grouped into _ genera.
[A]:
six