If ${A_1},{B_1},{C_1}$…. are respectively the co-factors of the elements ${a_1},{b_1},{c_1}$,…… of the determinant $\Delta = \left| {\,\begin{array}{*{20}{c}}{{a_1}}&{{b_1}}&{{c_1}}\\{{a_2}}&{{b_2}}&{{c_2}}\\{{a_3}}&{{b_3}}&{{c_3}}\end{array}\,} \right|$, then $\left| {\begin{array}{*{20}{c}}{{B_2}}&{{C_2}}\\{{B_3}}&{{C_3}}\end{array}} \right| = $

If $\left| {\begin{array}{*{20}{c}}
1&1&1\\
a&b&c\\
{{a^2}}&{{b^2}}&{{c^2}}
\end{array}} \right| = 5$ , then $\left| {\begin{array}{*{20}{c}}
{b{c^2} – {b^2}c}&{{a^2}c – a{c^2}}&{a{b^2} – b{a^2}}\\
{{b^2} – {c^2}}&{{c^2} – {a^2}}&{{a^2} – {b^2}}\\
{c – b}&{a – c}&{b – a}
\end{array}} \right|$ is equal to

The cofactor of the element $'4'$ in the determinant $\left| {\,\begin{array}{*{20}{c}}1&3&5&1\\2&3&4&2\\8&0&1&1\\0&2&1&1\end{array}\,} \right|$ is

If $a_i^2 + b_i^2 + c_i^2 = 1,\,\,(i = 1,2,3)$ and ${a_i}{a_j} + {b_i}{b_j} + {c_i}{c_j} = 0$ $(i \ne j,i,j = 1,2,3)$ then the value of ${\left| {\,\begin{array}{*{20}{c}}{{a_1}}&{{a_2}}&{{a_3}}\\{{b_1}}&{{b_2}}&{{b_3}}\\{{c_1}}&{{c_2}}&{{c_3}}\end{array}\,} \right|^2}$ is

If $A = \left| {\,\begin{array}{*{20}{c}}5&6&3\\{ – 4}&3&2\\{ – 4}&{ – 7}&3\end{array}\,} \right|\,, $ then cofactors of the elements of $2^{nd}$ row are