Note where middle C is on both clefs (for viola it's the center of the staff, piano treble clef it's the first ledger line below the bottom of the staff. Piano bass clef is the opposite of piano treble clef). Work from there.
Go to Settings > Notes > Password. Tap Reset Password. Enter your Apple ID password. Then tap Reset Password again. Enter your new password and password hint.
Sounds like either your battery isn't charged, is dead, or not inside your laptop. For Windows: when your laptop is on, you'll see a battery icon in the tray. It'll...
