GATE Electrical Engineering (EE) 2012 Solved Paper

The bus admittance matrix of a three – bus three – line system is
$\mathit{Y}=\mathit{j}\left[\begin{array}{ccc}-13& 10& 5\\ 10& -18& 10\\ 5& 10& -13\\ \end{array}\right]$
If each transmission line between the two buses is represented by an equivalent π – network, the magnitude of the shunt susceptance of the line connecting bus 1 and 2 is