Evaluate the steady-state error for the system described by Eqs. For unit step inputs.

\(A = \left[ {\begin{array}{*{20}{c}} { - 5}&1&0\\ 0&{ - 2}&1\\ {20}&{ - 10}&1 \end{array}} \right];B = \left[ {\begin{array}{*{20}{c}} 0\\ 0\\ 1 \end{array}} \right];C = \left[ {\begin{array}{*{20}{c}} { - 1}&1&0 \end{array}} \right]\)