Помогите ,пожалуйста !Study the table,then fill in AT ,IN ,or ON : 1)Irina doesn'the work ....... Saturdays 2)My birthday

At - часы, ночь, выходные (at 12 o\'clock, at noon, at night, at the weekend).In - годы, месяцы, части дня (in 1996, in September, in the morning).On - дни недели, даты (on Friday, on weekdays, on 5th April).1) Irina doesn\'t work on Saturdays. 2)My birthday is on 20th December. 3) He never works in the evening. 4) They go to school on weekdays. 5) I have a dancing lesson at 6 o\'clock.