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

Q: Tobacco kills four million people a year, one death every _ seconds.

A: eight
****
Q: Bacteriophage lambda has _ different life cycles.

A: two
****
Q: Newborn apes rely on their mothers for milk and depend on their care for _ years.

A:
five
****