Eight people are sitting in two parallel rows with four people each in such a way that there is equal distance between adjacent persons. 5, 6, 7 and 8 are seated in the same row facing South. 1, 2, 3 and 4 are seated in the same row facing North. 4 and 2 do not sit at the extreme corners of their row. 7 sits at the extreme right end of their row and is exactly opposite 1. 3 sits exactly opposite 8.

Who sits at the extreme left end of the row of people sitting facing South?