The temperature in a chimney corner is to be calculated using a finite difference model. The inner surface of the chimney is in contact with air at $410$ K $,$ with a heat transfer coefficient of $52\backslash (\backslash$mathrm$\{$W$\}/\backslash$mathrm$\{$m$\}^\{2\}\backslash$mathrm$\{$~K$\}\backslash ),$ while the outer surface is held at $296$ K $.$ The thermal conductivity of the chimney is $\backslash (64\backslash$mathrm$\{$~W$\}/\backslash$mathrm$\{$mK$\}\backslash ).$ The nodes are equally spaced, as shown in the figure. If the initial guess for the inner node temperatures is $350$ K $,$ on which number iteration of the Jacobi solution method does the temperature of the highlighted node change? $($State the numerical answer of the iteration number only, without any letters $-$ e$.$g$.10$ for the $10$th interation$).$