(1) A: Boys like comic books best, while girls like children's literature books least.

(2) A: Comic books that both boys and girls like.

(3)(2+7+ 13+6)+(3+5+ 12+8)

=28+28

=56 (person);

A: 56 people participated in the survey.

So, the answer is: comics and children's literature; Cartoons;