\hskip-.4in\begin{pspicture}(13,10)
\thicklines
\color{black}
\put( 6.3667, 4.3000){\bf { $\psi$}}
\put( 7.9247, 2.3750){\bf { $\phi={ \psi\over~2}$}}
\put( 7.7516, 5.8750){\bf { $\rho$}}
\put( 8.0978, 3.7750){\bf { $r$}}
\put( 6.3667, 9.3750){\bf { y}}
\put(11.5602, 1.5000){\bf { x}}
\psset{linewidth= 1.2 pt,linecolor=black}
\psset{linestyle=solid}
\psline
(  1.173118  ,  1.5  )
(  11.56021  ,  1.5  )
\color{red}
\psset{linewidth= 1.2 pt,linecolor=red}
\psset{linestyle=solid}
\pscurve
(  6.366667  ,  1.5  )
(  8.401793  ,  2.168439  )
(  9.659571  ,  3.918437  )
(  9.659575  ,  6.081554  )
(  8.4018  ,  7.831556  )
(  6.366675  ,  8.5  )
(  4.331547  ,  7.831565  )
(  3.073765  ,  6.081572  )
(  3.073756  ,  3.918454  )
(  4.331526  ,  2.16845  )
(  6.366649  ,  1.5  )
\color{green}
\psset{linewidth= 1.2 pt,linecolor=green}
\psset{linestyle=solid}
\pscurve
(  6.366667  ,  3.833333  )
(  7.045042  ,  4.056146  )
(  7.464302  ,  4.639479  )
(  7.464303  ,  5.360518  )
\psset{linewidth= 1.2 pt,linecolor=green}
\psset{linestyle=solid}
\pscurve
(  8.09785  ,  1.5  )
(  8.01312  ,  2.040779  )
(  7.767224  ,  2.528623  )
(  7.384232  ,  2.915779  )
\color{blue}
\psset{linewidth= 1.2 pt,linecolor=blue}
\psset{linestyle=solid}
\psline
(  6.366667  ,  1.5  )
(  6.366667  ,  8.5  )
\psset{linewidth= 1.2 pt,linecolor=blue}
\psset{linestyle=solid}
\psline
(  6.366667  ,  1.5  )
(  9.659575  ,  6.081554  )
\psset{linewidth= 1.2 pt,linecolor=blue}
\psset{linestyle=solid}
\psline
(  6.366667  ,  5  )
(  9.659575  ,  6.081554  )
\psset{linewidth= 1.2 pt,linecolor=blue}
\psset{linestyle=solid}
\psline
(  2.904301  ,  1.5  )
(  9.829033  ,  1.5  )
\end{pspicture}