Nomor soal pada buku

\newcounter{problem}
\newcounter{solution}
\newcommand\soal{%
  \stepcounter{problem}%
  \textbf{\color{blau} Soal \thesection.\theproblem\ }~%
  \setcounter{solution}{0}%
}
\newcommand\jawab{%
  \textbf{\color{blau} Jawaban}\par%
}