 LANG="en-US">a[3][1]=0.0;  a[3][2]=2.0;     a[3][3]=6.0;      a[3][4]=8.0;</SPAN>
    <SPAN LANG="en-US">a[4][1]=1.0;  a[4][2]=1.0;     a[4][3]=0.0;      a[4][4]=4.0;</SPAN>
    <SPAN LANG="en-US">b[1][1]=1.0;  b[1][2]=5.0;     b[1][3]=9.0;      b[1][4]=0.0;</SPAN>
    <SPAN LANG="en-US">b[2][1]=2.0;  b[2][2]=6.0;     b[2][3]=10.0;     b[2][4]=2.0;</SPAN>
    <SPAN LANG="en-US">b[3][1]=3.0;  b[3][2]=7.0;     b[3][3]=11.0;     b[3][4] = -1.0;</SPAN>
    <SPAN LANG="en-US">b[4][1]=4.0;  b[4][2]=8.0;     b[4]