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Найди координаты векторов:

\(\overrightarrow{a} \) \(\{-6; \, -10 \}\) ; \(\overrightarrow{b} \) \(\{3; \, 8\} \) .

1. \(\overrightarrow{a}+\overrightarrow{b}\) \(\{\) [ ] ;[ ] \(\}\) ;
2. \(4\cdot \overrightarrow{a}\) \(\{\) [ ] ;[ ] \(\}\) ;
3. \(-2\cdot \overrightarrow{a}+3\cdot\overrightarrow{b}\) \(\{\) [ ] ;[ ] \(\}\) ;
4. \(- \overrightarrow{b}\) \(\{\) [ ] ;[ ] \(\}\) .