Diagonalize A=(1111)A = \begin{pmatrix} 1 & 1 \\ 1 & 1 \end{pmatrix}A=(1111) as A=PDP−1A = PDP^{-1}A=PDP−1. What is DDD?
D=(0002)D = \begin{pmatrix} 0 & 0 \\ 0 & 2 \end{pmatrix}D=(0002)
D=(2000)D = \begin{pmatrix} 2 & 0 \\ 0 & 0 \end{pmatrix}D=(2000)
D=(1001)D = \begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}D=(1001)
D=(1100)D = \begin{pmatrix} 1 & 1 \\ 0 & 0 \end{pmatrix}D=(1010)