
\input{02/L02/15/Fig.tikz}

\pgfmathparse{-1.2} \let\t\pgfmathresult;
\pgfmathparse{1-\t} \let\tt\pgfmathresult;
\pgfmathparse{-3.4} \let\s\pgfmathresult;
\pgfmathparse{1-\s} \let\ss\pgfmathresult;

\draw [color=orange]
   ($\t*(S12)+\tt*(S22)$) 
   --
   ($\ss*(S12)+\s*(S22)$)
   node[right,black] {$t_2$};
   

\pgfmathparse{-0.05} \let\t\pgfmathresult;
\pgfmathparse{1-\t} \let\tt\pgfmathresult;
\pgfmathparse{-0.8} \let\s\pgfmathresult;
\pgfmathparse{1-\s} \let\ss\pgfmathresult

\draw [color=orange] 
   ($\t*(S1k)+\tt*(S2k)$)
   --
   ($\ss*(S1k)+\s*(S2k)$)
   node[right,black] {$t_k$};
   
   
   
\coordinate (DeltaB) at (0.2,-0.2);

%Text B_1 e B_k
\node[above] at (S12) {\small{$B_2~~$}};
\node[above] at (S1k) {\small{$B_k~~$}};

\coordinate (T1k) at ($(A2)+  4.0*(V1)$);
\coordinate (T2k) at ($(A2)+  4.0*(V2)$);

\coordinate (T14) at ($(A2)-  1.0*(V1)$);
\coordinate (T24) at ($(A2)-  1.0*(V2)$);

\draw [blue]
   (T1k) 
   --
   (T14)
   node[anchor=north] {$s_{2,2}$}
   ;
\draw [gray]
   (T2k)
   node[anchor=south] {$s_{2,m}$}
   --
   (T24)
   ;

\coordinate (T1k) at ($(Ak)+  4.0*(V1)$);
\coordinate (T2k) at ($(Ak)+  4.0*(V2)$);

\coordinate (T14) at ($(Ak)-  1.0*(V1)$);
\coordinate (T24) at ($(Ak)-  1.0*(V2)$);

\draw [blue]
   (T1k)
   node[anchor=south] {$s_{k,2}$}
   --
   (T14)
   ;
\draw [gray]
   (T2k)
   --
   (T24)
   node[anchor=north] {$s_{k,m}$}
   ;
