The correct Active/Passive form of the given sentence is:

☀ Notes have to be written by the students.

Explanation for other options:

☀ Notes was to be write by the students. This option has incorrect verb forms. The correct form should be "Notes were to be written by the students."

☀ Notes had been written by the students. This option uses the past perfect tense ("had been written"), which suggests an action completed before a certain point in the past. The original sentence is in the present tense, so the correct form should be "Notes have to be written by the students."

☀ Notes were to be writing by the students. This option has incorrect verb forms. The correct form should be "Notes were to be written by the students."