If A=(23)A = \begin{pmatrix} 2 \\ 3 \end{pmatrix}A=(23), what is the transpose ATA^TAT?
(23)\begin{pmatrix} 2 \\ 3 \end{pmatrix}(23)
(23)\begin{pmatrix} 2 & 3 \end{pmatrix}(23)
(32)\begin{pmatrix} 3 & 2 \end{pmatrix}(32)
(32)\begin{pmatrix} 3 \\ 2 \end{pmatrix}(32)