\textbf{144-} In a group of 7 literature books, 2 art books, and 10 mathematics books. At least how many books must we take from this group so that we are certain that, with at least 4 books, both subjects are represented?
\[
(1)\quad 10 \qquad (2)\quad 9 \qquad (3)\quad 8 \qquad (4)\quad 7
\]