\begin{tabular}{|ccc||ccccc|ccccc|} \hline
\multicolumn{3}{|c||}{Specifications} & \multicolumn{5}{|c|}{Time (s)} & \multicolumn{5}{|c|}{Rel. Resids.}\cr  $m$&   $n$& \% density&  Exact & Inexact &    HLWB &     LSQ &   QPPAL &   Exact & Inexact &    HLWB &     LSQ &   QPPAL \cr\hline
  200 &  3000 & 8.1e-01 &3.12e-03 & 3.69e-02 & 4.45e+01 & 3.50e+00 & 8.66e-01 &  8.64e-18 & 7.39e-17 & 2.56e-04 & 6.52e-16 & 5.89e-17 \cr\hline
  200 &  3500 & 8.1e-01 &3.08e-03 & 4.05e-02 & 5.17e+01 & 4.93e+00 & 1.00e+00 &  9.07e-18 & 1.26e-17 & 2.78e-04 & 1.23e-15 & 2.15e-17 \cr\hline
  200 &  4000 & 8.1e-01 &3.24e-03 & 3.70e-02 & 5.82e+01 & 7.31e+00 & 1.09e+00 &  1.46e-16 & 8.91e-16 & 2.80e-04 & 3.21e-16 & -9.18e-18 \cr\hline
  200 &  4500 & 8.1e-01 &3.99e-03 & 4.17e-02 & 6.58e+01 & 1.01e+01 & 1.18e+00 &  1.80e-15 & 2.05e-16 & 3.13e-04 & 4.61e-17 & 1.71e-16 \cr\hline
  200 &  5000 & 8.1e-01 &3.93e-03 & 3.42e-02 & 7.30e+01 & 1.45e+01 & 1.26e+00 &  4.09e-17 & 1.80e-15 & 3.16e-04 & 5.27e-17 & -6.28e-17 \cr\hline
\end{tabular}