How long have the children done the following? Как длинно малыши

How long have the children done the following? Как длинно малыши занимаются этим?
Пример:
Helen plays the piano. She started to play the piano two years ago.
Ответ:
Helen has played the piano for two years.

1) Ben and Jim are friends. They became friends in 2000.
2) Net and Sandra learn French. They started in three years ago.
3) Daniel is reading a new book. He started it on Saturday.
4) Paul likes riding horses. He rode a horse for the first time when he was four.
5) Molly plays football. She started it at 5 oclock.