\[\boxed{\mathbf{960\ (960)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ a < 0\]
\[b > 0\]
\[a < b\]
\[\textbf{б)}\ |a| > 0\]
\[|b| > 0\]
\[|a| = |b|\ \]