Пожалуйста посчитайте пожалуйста очень ​

1) They will have already been rehearsing for an hour when we come.

2) l will have been working in this company for 10 years next April.

3) By next year he will have been writing the novel for three years.

4) The thieves are sure that they will have been driving for 6 hours when the police discover the robbery in the morning.

5) They will have been studying for 3 hours when you come.