\[\boxed{\mathbf{876\ (}\mathbf{с}\mathbf{)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1) - p = 8;\ \ p = - 8\]
\[2) - p = - 18;\ \ p = 18\]
\[3) - p = - 0,1;\ \ \ p = 0,1\]
\[4) - p = 0;\ \ p = 0\]