1. Determine whether the matrix is in row echelon form, reduced row echelon form, both, or neither. 1 2 0 1 0 O i -3 7 1 a. [0 1 0 b.|[0 1 O c. |0 1 4 0 0O 0 O 0o 2 0 0 1 1 2 3 1 0 0 =3 1 -2 0 1 d [0 0 ee|l0 1 0 0 f 0 0 1 -2 0 0 0 0 1 7 1 2 3 4 5 1 -3 0 O 0O 1 0 1 O T 1 =& ' g. h. |0 0 0 1 ilo0 0 1 0 0o O o0 1 0 0 1 0 0 0 O 0O 0 O o0 o 2. Solve each system by Gauss-Jordan elimination. Assume matrices already presented in augmented matrix form correspond to linear systems in x,y, & z. For systems having infinitely many solutions, express your answer using parametric equations. 3.0