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\(\overrightarrow{f}\{1;2;-1\}\) , \(\overrightarrow{h}\{5;-2;8\}\) , \(\overrightarrow{g}\{-1;4;1\}.\)

\(\overrightarrow{f} \cdot \overrightarrow{g}=\) [ ]

\(\overrightarrow{f} \cdot \overrightarrow{h}=\) [ ]

\(\overrightarrow{g} \cdot \overrightarrow{g}=\) [ ]

\(\sqrt{\overrightarrow{f} \cdot \overrightarrow{g}}=\) [ ]