What is the result of the matrix multiplication (1001)(2345)\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix} \begin{pmatrix} 2 & 3 \\ 4 & 5 \end{pmatrix}(1001)(2435)?
(2345)\begin{pmatrix} 2 & 3 \\ 4 & 5 \end{pmatrix}(2435)
(4523)\begin{pmatrix} 4 & 5 \\ 2 & 3 \end{pmatrix}(4253)
(0000)\begin{pmatrix} 0 & 0 \\ 0 & 0 \end{pmatrix}(0000)
(1001)\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}(1001)