\[\boxed{\mathbf{4.}\mathbf{45}}\]
\[\textbf{а)}\ Z = \{ - 8;\ - 7\}\]
\[\textbf{б)}\ Z = \{ - 3;\ - 2;\ - 1\}\]
\[\textbf{в)}\ Z = \{ - 2;\ - 1;0;1;2\}\]
\[\textbf{г)}\ Z = \{ - 5;\ - 4;\ - 3;\ - 2;\ - 1;0;\]
\[1;2;3;4;5;6\}\]
\[\textbf{д)}\ Z = \{ 1;2;3\}\]
\[\textbf{е)}\ Z = \{ 5;6\}\]
\[\textbf{ж)}\ Z = \{ - 9;\ - 8;\ - 7\}\]
\[\textbf{з)}\ Z = \{ - 14; - 13; - 12; - 11;\]
\[- 10; - 9; - 8\}\]