In the week I study 3 days: Tuesday, Thursday, Friday. I can work a full day on Saturday, Sunday, Monday, Wednesday and the other days I study after school at 4:30 minutes.
I study three days a week: Tuesday, Thursday, and Friday. I can work all day on Saturdays, Sundays, Mondays, and Wednesdays. The other day after school is 16:30.
In a week, I studied for three days, Tuesday, Thursday and Friday. I can work all day on Saturday, Sunday, Monday and Friday, and on other days, after school, it is 16 o'clock. 30 minutes