Harini correctly remembers that her mother's birthday is not on or after May 17th. Her brother correctly remembers that their mother's birthday is before May 19th but after May 14th. On which day in May was definitely their mother's birthday?

Seven boxes, B, D, E, P, S, T and W, are kept one over the other, but not necessarily in the same order. No box is kept above P. Only three boxes are kept between P and B. Only one box is kept between D and S. S is kept immediately above B. Only four boxes are kept between D and T. E is kept at some place above W. Which box is kept second below E?

Each of six teachers M, N, P, Q, S and T have their classes on six different days of a week starting from Monday and ending on Saturday of the same week, but not necessarily in the same order. Only two teachers have classes before N's class. 'S' has the class on Tuesday and 'Q' has the class on Saturday. Only one teacher has the class after the class of 'M'. P's class is not between the classes of 'M' and 'N'. Who among the following has the class on Monday?