If A=(1234)A = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix}A=(1324), what is 2A2A2A?
(2234)\begin{pmatrix} 2 & 2 \\ 3 & 4 \end{pmatrix}(2324)
(2468)\begin{pmatrix} 2 & 4 \\ 6 & 8 \end{pmatrix}(2648)
(3456)\begin{pmatrix} 3 & 4 \\ 5 & 6 \end{pmatrix}(3546)
(1468)\begin{pmatrix} 1 & 4 \\ 6 & 8 \end{pmatrix}(1648)