Direction: Study the following information carefully and answer the given questions.

There are seven students M, N, O, P, Q, R and S appeared in an exam of 100 questions divided into 4 sections, section I, II, III and IV. Each section has equal number of questions. Question attempted by them are 65, 55, 40, 50, 60, 70, 80 not in the same order.

M is good at section I and III and attempted all the question of these 2 sections. He also attempted some more questions from section IV. Q attempts all questions of the section not attempted by M. Q attempted 15 questions from the section from which M attempted 20 questions. N attempted all questions similarly as M and 10 more from section II. P attempted same as Q and 10 more from section IV. O attempted similar question to P and 10 more from section I. R and S attempted similar question but S attempted 10 questions more from section II. R attempted all the question of odd section and 5 more from section IV.