(iii) A−1=[−1338326323−13−4323−13−13]\boxed{A^{-1}=\begin{bmatrix}-\frac{13}{3}&\frac{8}{3}&\frac{26}{3}\\\frac{2}{3}&-\frac{1}{3}&-\frac{4}{3}\\\frac{2}{3}&-\frac{1}{3}&-\frac{1}{3}\end{bmatrix}}A−1=−313323238−31−31326−34−31