A certain number of people are sitting in a row, facing north. Only two people sit between R and S. P sits to the immediate left of R. T sits second to the right of S. Q sits second to the left of P. U sits second to the right of T. If no other person is sitting in the row, what is the total number of persons seated?

Seven people, M, N, O, P, X, Y, and Z are sitting in a row, facing north. No one sits to the left of X. Only four people sit between X and O. Only three people sit to the right of M. Z sits to the immediate left of N. P is not an immediate neighbor of M. Who sits at the rightmost end of the line?

Five students are sitting in a row facing North. Akbar is to the left of the person sitting in the middle, but to the right of Sekar. Prakash is to the right of Deva, and Ram is to the right of Prakash. Ram is second from the person sitting in the middle. Who is the person sitting in the middle?