//  Matrix for Midterm Part 2 Extra Credit.
double A[5][5]={
    {  3.1411235,  2.9670499, -2.0696759, -0.1696742, -0.4045575 },
    {  0.3868716,  3.6300832, -0.7903713, -0.1573674,  0.6810963 },
    {  0.1909349,  1.5450310,  1.8109176, -0.6418465,  0.3332143 },
    { -0.0049263, -1.7362550,  0.7578766,  0.0782331,  2.9166110 },
    { -0.0240325, -2.1275275,  0.3860839, -1.2922110,  6.3396425 }};