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 none of the three subjects?