If A=(1111)A = \begin{pmatrix} 1 & 1 \\ 1 & 1 \end{pmatrix}A=(1111), what is AnA^nAn for n≥1n \geq 1n≥1?
2n−1A2^{n-1}A2n−1A
2nA2^n A2nA
AAA
2n−1I2^{n-1} I2n−1I