Inverse of a matrix

What is A^–1 equal to?

Consider the following statements about the matrix M

Statement I: The inverse of M does not exist.

 Statement II: M is non-singular.

 Which one of the following is correct in re- spect of the above statements?

Consider the following in respect of the matrix

.

1. Inverse of A does not exist.

2. A³ = A

3. 3A = A²

Which of the above are correct?