If $$A = \left[ {\matrix{ 0 & 1 \cr 1 & 0 \cr } } \right]$$, then the value of A⁴ is

A square matrix A is called orthogonal, if

where A' is the transpose of A

If A and B are two invertible square matrices of same order, then what is (AB)^$$-$$1 equal to?

Consider the following in respect of matrices A, B and C of same order.

1. (A + B + C)' = A' + B' + C'

2. (AB)' = A' B'

3. (ABC)' = C' B' A'

Where, A' is the transpose of the matrix A. Which of the above are correct?