Given that A=[00−2121103]A = \begin{bmatrix} 0 & 0 & -2 \\ 1 & 2 & 1 \\ 1 & 0 & 3 \end{bmatrix}A=011020−213, B=A12B = A^{12}B=A12. 'b' is obtained by summing up all the elements in BBB. What is mod(|b|,5), where mod(.) is the modulo operator?