In an interview of 50 students,

12 liked Proposition 8 and Proposition 13.
18 liked Proposition 8, but not Proposition 5.
4 liked Proposition 8, Proposition 13, and Proposition 5.
25 liked Proposition 8.
15 liked Proposition 13.
10 liked Proposition 5, but not Proposition 8 nor Proposition 13.
1 liked Proposition 13 and Proposition 5, but not Proposition 8.

a. Show the completed Venn diagram.

b. Of those surveyed, how many did not like any of the three propositions?

c. How many liked Proposition 8 and Proposition 5?