Must ✔️or mustn't ❌?

MUST or MUSTN'T ? 🤔😉🤷‍♂️

MUST--> OBLIGATION✔️

Examples:

I must go to school from Monday to Friday.
I must do my homework every day.
I must go to bed early.

MUSTN'T--> PROHIBITION ❌

Examples:

I mustn't eat in the classroom.
I mustn't go to bed at 12 pm.
I mustn't speak with people I don't know.

CLICK ON TRUE 👍 OR FALSE👎. WHICH PHRASES ARE CORRECT?