Using the energy balance method, derive the finite$-$difference equation for the Tim, n$)$ nodal point on a planTake Tm$-1,$n$=3\backslash$deg C$,$ Tm$,$n$+1=3\backslash$deg C$,$ Tm$,$n$-1=4\backslash$deg C$,$ Tm$+1,$n$=5\backslash$deg C$,$ k$=40$ W$/$m$.$k$,$ h$=5$ W$/$m$^2.$k$,$ T$=40\backslash$deg C and consider Ay $=$Ax $500-$mm $.$ Find the heat transfer in the x$-$direction between Tm$+1,$n and Tm$,$n