This is only Multiple choice . PROVIDE necessary brief explaination or solutions thank you. Follow the numbering

Which of the following is not a property of a matrix in row-echelon form? * (1 Point) 0 All rows consisting entirely of zeros, if any, are at the bottom of the matrix. If a column contains a leading entry of 0 some row, then all other entries in that column are zero. By reading from left to right, the first 0 nonzero entry in each row that does not consist entirely of zeros is a 1 called the leading entry of its row. lfi and i+1 are two successive rows 0 that do not consist entirely of zeros, then the leading entry of row i+1 is to the right of the leading entry of row i. It is a diagonal matrix where all terms on the main diagonal are equal. * (1 Point) O Square matrix Q Scalar matrix Q Diagonal matrix 0 Identity matrix It is a diagonal matrix where all terms on the main diagonal are equal. * (1 Point) O Zeero matrix Q Lower rectangular matrix 0 Unit matrix Q Triangular matrix