When I (to come in) she (to play) the piano.and she to (to say) she (to play) for 2 hours already.we (to go) to the institute

1. When I came in she was playing the piano and she said she had been playing for 2 hours already. 2. We were going to the institute when we met him yesterday. 3. Mother answered she had been doing the flat for an hour but she was afraid she wouldn\'t be able to have finished it by their arrival. 4. What were you doing when I rang you up yesterday? - I was doing my lessons for the next day. 5. I saw she was writing something and decided hot to disturb her.