Consider steady two$-$dimensional heat transfer in a rectangular cross section $(60$x$30$ cm$2)$ with the prescribed temperature at the left, right, and bottom surfaces to be $0$oC$,$ and the top surface is given as $100$ sin$(/60).$ Using a uniform mesh size $(=),$ determine $($a$)$ the finite difference equations and $($b$)$ the nodal temperatures by matrix inversion technique writing your own code and EES software