помогите пожалуйста, мне очень нужно, номер 4, буду очень благодарна и признательна, заранее спасибо!!

At 7 they were having breakfast.At 9.30 they were studying Maths.At 13.00 they were having lunch.At 15.00 they were playing tennis.At 18.00 they were doing their homework.