If A=(5005)A = \begin{pmatrix} 5 & 0 \\ 0 & 5 \end{pmatrix}A=(5005), what is 15A\frac{1}{5}A51A?
(1001)\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}(1001)
(5005)\begin{pmatrix} 5 & 0 \\ 0 & 5 \end{pmatrix}(5005)
(250025)\begin{pmatrix} 25 & 0 \\ 0 & 25 \end{pmatrix}(250025)
(0110)\begin{pmatrix} 0 & 1 \\ 1 & 0 \end{pmatrix}(0110)