Six people, A, B, C, D, E, and F, are sitting in a straight line facing north. Only B sits to the left of D. F sits third to the left of E. C sits third to the right of D. A sits to the immediate right of F. Who sits at the extreme right end of the line?

Five girls, Grace, Victoria, Lucy, Sofia, and Alice, are sitting on a bench, facing north. Grace is sitting to the immediate left of Victoria. Grace is sitting to the immediate right of Sofia. Lucy is sitting to the immediate right of Victoria. Lucy is sitting to the immediate left of Alice. Who is sitting at the extreme left end?

Seven people, K, L, M, N, A, B, and C, are sitting in a straight line facing north. Only two people sit to the right of M. Only two people sit between M and K. Only two people sit between C and A. A sits to the immediate left of M. B sits to the immediate right of L. Who sits at the third position from the left end of the line?