Find the cofactor C13C_{13}C13 (also written as M13M_{13}M13 with sign) of the matrix: A=(2134−12105)A = \begin{pmatrix} 2 & 1 & 3 \\ 4 & -1 & 2 \\ 1 & 0 & 5 \end{pmatrix}A=2411−10325
C13=1C_{13} = 1C13=1
C13=−1C_{13} = -1C13=−1
C13=2C_{13} = 2C13=2
C13=−2C_{13} = -2C13=−2