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

[EX Q]: Calves grow quickly and are weaned from their mothers in only _ to four months.
[EX A]: three

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

[EX Q]: Caterpillars are grayish with _ pairs of blue spots and six pairs of red spots along their back.
[EX A]:
five