Show the right variant: Ann asked, “Can you come to my party on Saturday, Stephen”.

1 Ann asked Stephen if could he come to her party on Saturday.
2 Ann   asked Stephen if he could come to her party on Saturday.
3 Ann asked Stephen if  can he come to her party on Saturday.
4 Ann asked Stephen if can come to her party on Saturday.
5 Ann ask Stephen if can come to her party on Saturday.