Complete the questions with tag endings.The friends were responsible for the project,?Tomorrow the students will arrange

1) The friends were responsible for the project, weren\'t they (Past Indefinite)? 2) Tomorrow the students will arrange the date and time, won\'t they (Future Indefinite)? 3) Jim didn\'t take part in the project, did he (Past Indefinite)? 4) There were a lot of students in the hall, weren\'t there (Past Indefinite)?