In a class of 80 students, some students like Mathematics (M), Science (S), and English (E).

40 students like Mathematics

35 students like Science

30 students like English

15 students like both Mathematics and Science students

12 students like both Mathematics and English

10 students like both Science and English

5 students like all three subjects

Based on the above information, answer the following question.

How.many students like exactly two subjects?