Seven contestants, H, I, J, K, L, M and N, enter the stage at a contest in a certain sequence. I enters exactly before M. J enters exactly after N. Exactly one contestant enters the stage after M and before H in that order. L enters third. H enters last. Based on the given information, which of the following options is true?

Each of P, Q, R, S, T, U and V has an exam on a different day of a week, starting from Monday and ending on Sunday of the same week. Q has an exam on Tuesday. Only one person has an exam after V. T has an exam immediately before S but after U. R has an exam before U. Who has an exam immediately after V?

Seven boxes, C, D, E, F, X, Y and Z, are kept one over the other but not necessarily in the same order. Only four boxes are kept between D and Z. Only F is kept above D. Only two boxes are kept between X and C. E is kept immediately above Y. C is not kept immediately above E. Which box is kept fourth from the top?