\section{Given data} Number of storeys = 4
\section{Mass}
\[
\begin{bmatrix*}[r]
 8.0000e+00 &  0.0000e+00 &  0.0000e+00 &  0.0000e+00 \\ 
 0.0000e+00 &  8.0000e+00 &  0.0000e+00 &  0.0000e+00 \\ 
 0.0000e+00 &  0.0000e+00 &  4.0000e+00 &  0.0000e+00 \\ 
 0.0000e+00 &  0.0000e+00 &  0.0000e+00 &  4.0000e+00 \\ 
\end{bmatrix*}
\]
\section{Stiffness matrix}
\[
\begin{bmatrix*}[r]
 1.8000e+03 &  -8.0000e+02 &  0.0000e+00 &  0.0000e+00 \\ 
 -8.0000e+02 &  1.4000e+03 &  -6.0000e+02 &  0.0000e+00 \\ 
 0.0000e+00 &  -6.0000e+02 &  1.2000e+03 &  -6.0000e+02 \\ 
 0.0000e+00 &  0.0000e+00 &  -6.0000e+02 &  6.0000e+02 \\ 
\end{bmatrix*}
\]
\section{Eigen vector}
\[
\begin{bmatrix*}[r]
 -9.1441e-02 &  1.8481e-01 &  2.7904e-01 &  -6.7962e-02 \\ 
 -1.8720e-01 &  2.0735e-01 &  -1.6423e-01 &  1.4140e-01 \\ 
 -2.6424e-01 &  -7.4460e-02 &  -1.3371e-01 &  -3.9592e-01 \\ 
 -3.0556e-01 &  -3.0027e-01 &  1.4983e-01 &  2.0981e-01 \\ 
\end{bmatrix*}
\]
\section{Omega square}
\[
\begin{bmatrix*}[r]
 2.0283e+01 &  0.0000e+00 &  0.0000e+00 &  0.0000e+00 \\ 
 0.0000e+00 &  1.1280e+02 &  0.0000e+00 &  0.0000e+00 \\ 
 0.0000e+00 &  0.0000e+00 &  2.8385e+02 &  0.0000e+00 \\ 
 0.0000e+00 &  0.0000e+00 &  0.0000e+00 &  4.3306e+02 \\ 
\end{bmatrix*}
\]
\section{Frequency}
\[
\begin{Bmatrix*}[r]
 4.5036e+00 \\ 
 1.0621e+01 \\ 
 1.6848e+01 \\ 
 2.0810e+01 \\ 
\end{Bmatrix*}
\]
\section{Time periods}
\[
\begin{Bmatrix*}[r]
 1.3951e+00 \\ 
 5.9159e-01 \\ 
 3.7293e-01 \\ 
 3.0193e-01 \\ 
\end{Bmatrix*}
\]
\section{Level floor}
\[
\begin{Bmatrix*}[r]
 4.0000e+00 \\ 
 8.0000e+00 \\ 
 1.2000e+01 \\ 
 1.6000e+01 \\ 
\end{Bmatrix*}
\]
\section{Modal participation factor}
\[
\begin{Bmatrix*}[r]
 -4.5083e+00 \\ 
 1.6383e+00 \\ 
 9.8306e-01 \\ 
 -1.5693e-01 \\ 
\end{Bmatrix*}
\]
Model Contribution of 95.871% for 2number of modes
