If $A$ is a matrix with $n\geq2$, prove the following property of its cofactor matrix - $ {cof} (A^t) = ({cof} (A))^t$.
Are the following properties of matrices and determinants of use here -
(a) $ \det(A^t)=\det(A)$;
(b) $(A^{-1})^t=(A^t)^{-1}$;
(c) $ A^{-1}=\frac{1}{\det(A)}(cof(A))^t$.