If A=(2002)A = \begin{pmatrix} 2 & 0 \\ 0 & 2 \end{pmatrix}A=(2002), what is A−1A^{-1}A−1?
(0.5000.5)\begin{pmatrix} 0.5 & 0 \\ 0 & 0.5 \end{pmatrix}(0.5000.5)
(2002)\begin{pmatrix} 2 & 0 \\ 0 & 2 \end{pmatrix}(2002)
(1001)\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}(1001)
(−200−2)\begin{pmatrix} -2 & 0 \\ 0 & -2 \end{pmatrix}(−200−2)