Let \( \overrightarrow{\mathrm{u}}, \overrightarrow{\mathrm{v}} \) and \( \overrightarrow{\mathrm{W}} \) are vectors such that \( \overrightarrow{\mathrm{u}}+\overrightarrow{\mathrm{v}}+\overrightarrow{\mathrm{W}}=\overrightarrow{0} \).
\( \mathrm{P} \) If \( |\overrightarrow{\mathrm{u}}|=3,|\overrightarrow{\mathrm{v}}|=4 \) and \( |\overrightarrow{\mathrm{w}}|=5 \), then the value of
W \( \overrightarrow{\mathrm{u}} \cdot \overrightarrow{\mathrm{v}}+\overrightarrow{\mathrm{v}} \cdot \overrightarrow{\mathrm{w}}+\overrightarrow{\mathrm{w}} \cdot \overrightarrow{\mathrm{u}} \) is
(1) -25
(2) -27
(3) 28
(4) 25
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