Mr Abc, 请坐下.(Ask customer to sit in communication). Translat

Mr Abc, 请坐下.(Ask customer to sit in communication). Translate it into English
Please provide a better answer and explain in mandarin.
1)Mr Abc, Take a seat.
2)Mr Abc, Please take a seat.
3)Mr Abc, Take a seat.
4)Mr Abc, Please take a seat.
5)Mr Abc, sit on this chair.
6)Mr Abc, please sit down.