2. Consider the S.L.E. x1 + x2 + x3 + x4 + 3x5 = 2 x+3x2+2x3+4x4 + 2x5 = 2 2x2 + x3 + 3x4+x5 = 2 (a) Write this S.L.E. as a matrix equation Ax = b. (b) Put the augmented matrix for this S.L.E. in reduced row echelon form. (e) Find all solutions of the S.L.E. and express them (if any) in parametric vector form.