A sample poll of students revealed the following information in favour of three subjects: Mathematics, Physics and Chemistry. if 45% of the students like chemistry, 19% like physics and mathematics, 15% like chemistry and physics, 25% like chemistry and mathematics, 60% like chemistry or physics. 84% Like chemistry or mathematics and 90% like chemistry or mathematics or physics. find the percentage that like a) all the three subjects b) none of the three subjects c) exactly one subject d) mathematics and physics only e) exactly two subjects​