[Tex/LaTex] Table with text wrapping

Question

Row 1 has one line and centered for each cell.

Row 2. Column 1 has two (2) lines. each line centered.
Row 2. Column 2 has one line. centered horizontal and vertical.
Row 2. Column 3 has text wrapping.justified.

Row 3 and 4 repeat Row 1.

Answer 1

\documentclass{article}
\usepackage{array}
\newcolumntype{L}{>{\centering\arraybackslash}m{3cm}}

\begin{document}

\begin{table}
\begin{tabular}{|L|c|L|}\hline
one & two & three \\\hline
This is two line thing and centered & only one line&  \multicolumn{1}{m{3cm}|}{This is justified and may go to second line as well, neatly}\\\hline
  one & two & three \\\hline
  one & two & three \\\hline
\end{tabular}
\end{table}
\end{document}