Consider the matrix A=(5412)A = \begin{pmatrix} 5 & 4 \\ 1 & 2 \end{pmatrix}A=(5142). Which of the following are eigenvectors?
(41)\begin{pmatrix} 4 \\ 1 \end{pmatrix}(41)
(1−1)\begin{pmatrix} 1 \\ -1 \end{pmatrix}(1−1)
(11)\begin{pmatrix} 1 \\ 1 \end{pmatrix}(11)
(−11)\begin{pmatrix} -1 \\ 1 \end{pmatrix}(−11)