CG: Number of iterations = 7 Residual norm 1.33405e-07; Error norm 3.51809e-08. MINRES: Number of iterations = 7 Residual norm 1.3083e-07; Error norm 3.6258e-08. SYMMLQ: Number of iterations = 7 Residual norm 1.33405e-07; Error norm 3.51809e-08.