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

Rams can be policerate, often producing _ horns.
four

Giraffes have two horns and _ or three knobs.
two

Astronomers officially recognize _ major planets.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
nine

