Seven people are standing in a line facing front. N is standing immediately behind M but ahead of O. L is standing behind K and before M. P is standing before Q and is second from the front end. Who is standing at the 4th position from the front?

How many people are there in a group standing in a straight line, given that A and E are at the two ends and there are exactly 3 people between them?

A certain number of people are sitting in a row, facing North. Only eight people sit between R and P. Only two people sit to the left of Q. R sits third to the right of T. Only four people sit between P and Q. Only two people sit to the right of V. Only six people sit between T and V. If no other person is sitting in the row, then what is the total number of people seated?