The black keys on the piano are used to play sharp or flat notes.
a. true
b. false

B)False

Explanation:

There are 88 total keys on a piano

Most keyboards come with 66, 72, or 88 keys. For a beginner, 66 keys are sufficient for learning to play, and you can play most music on a 72-key instrument. For anyone interested in playing classical piano, however, a full 88 keys are recommended, especially if you plan on one day playing a traditional piano.

i think the answer could be either a or b because both are part of the post production part. hopefully this you a little.