Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[EX Q]: Potential energy is divided into ____ different types of energy.
[EX A]: three

[EX Q]: Respiratory therapists complete two to ____ years of education.
[EX A]: four

[EX Q]: Microorganisms are an essential part of Form ____ biology.
[EX A]:
five