Upgrade subject to access all content

Which of the following statements are true about the row echelon form of a matrix and the reduced row echelon form of a matrix? Select ALL that apply.

If a matrix is in row echelon form, it must be in reduced row echelon form.

If a matrix is in reduced row echelon form, it must be in row echelon form.

The row echelon form of a matrix is unique.

The reduced row echelon form of a matrix is unique.

None of the above.