Find a sequence of elementary matrices that can be used to write the matrix in row echelon form 1 2 1 0 036 3 5 10 7 0 1 H 1 0 O 0 1 0 0 1 2 0 100 0 1 0 5 0 1 O 01 30 0 1 0 0 i 0 0 1 50 1 0 1 00 1 0 0 1 0 0 0 1 0 50 1 illa 11 1 0 0 1 0 0 0 1 0 0 0 1 2 0 1 0 0 1 0 0 1 3 0 0 1 0 i 501 0 1 3 0 1 0 0 1 0 0 0 1 0 0 ell 1 3 0 0 1 0 0 1 2 100 010 0 1 3 0 0 1 0 1 0 0 0 1 0 0 0 1 2 I 100 0 1 0 5 0 1 1 0 0 0 1 0 0 0 1 2