Past simple vs present perfect (past participle) complete the sentences with the verbs in brackets 1?

Complete the sencond sentence using the past simple and the past perfect?

1. - the police had found my bike, then they called me 2. - we couldn't go out, bacause joe hadn't finished his work 3. - Before a mugger stolen my bag, i'd had a nice day 4. - before we arrived at the party, everyone…