помогите раскрыть скобки.Put the verbs in brackets into the correct infinitive

Помогите раскрыть скобки.
Put the verbs in brackets into the correct infinitive form or -ing form.
1.Visitors are not pemmited (Touch) works of art or to lean on the cases.
2.We advise (keep) a safe distance between you and each work of art.
3.Visitirs are encouraged (Speak) quietly in the museum.
4.We do not allow (Smoke) inside the museum building.