If \( a \neq b \neq c \), \( \Delta_1 = \begin{vmatrix} 1 & a^2 & bc 1 & b^2 & ca 1 & c^2 & ab \end{vmatrix} \), \( \Delta_2 = \begin{vmatrix} 1 & 1 & 1 a^2 & b^2 & c^2 a^3 & b^3 & c^3 \end{vmatrix} \) and \( \frac{\Delta_1}{\Delta_2} = \frac{6}{11} \), then \( 11(a + b + c) = \)